CWE-384 CVEs · Low

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Overview 29 matches · 0 in Waratek scope · 0 protected · 0 exploited · 0 CISA KEV · 0 public PoC · 0 EPSS ≥ 0.5

29matches 0in Waratek scope0.0% 0protected0.0% 0exploited0.0% 0CISA KEV0.0% 0public PoC0.0% 0EPSS ≥ 0.50.0%

Protected by Waratek 0 0.0% Rule in development 0 0.0% Mitigation candidate 0 0.0% No exploit published 0 0.0% Outside Waratek scope 0 0.0% Not applicable 29 100.0% Withdrawn CVE 0 0.0%

Critical 0 0.0% High 0 0.0% Medium 0 0.0% Low 29 100.0% None 0 0.0% Unknown 0 0.0%

blocked by ARMR today 0 0.0% partly blocked 0 0.0% not blocked 29 100.0% not established 0 0.0% unrecorded 0 0.0%

Exploited 0 0.0% Working exploit published 0 0.0% Proof of concept only 11 37.9% Forecast only 0 0.0% No public exploit 18 62.1%

split by StatusSeverityProtectionExploit maturity peak 12 / year

20011 Not applicable1 Low1 not blocked1 No public exploit1 20020 20030 20040 20050 20060 20070 20080 20090 20100 20110 20120 20130 20140 20150 20160 20173 Not applicable3 Low3 not blocked3 No public exploit3 20184 Not applicable4 Low4 not blocked4 No public exploit4 20190 20202 Not applicable2 Low2 not blocked2 No public exploit2 20210 20220 20230 20241 Not applicable1 Low1 not blocked1 Proof of concept only1 20256 Not applicable6 Low6 not blocked6 Proof of concept only3 No public exploit3 202612 Not applicable12 Low12 not blocked12 Proof of concept only7 No public exploit5

200220052008201120142017202020232026

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CVE	Severity	Published▾	Status	Exploitation	Description
CVE-2026-125078	Low	2026-11-10	Not applicable	Proof of concept only	A security flaw has been discovered in SourceCodester Smart Attendance System with QR Code Scanner 1.0. This affects an unknown part of the file login.php. The manipulation results in session fixiation. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.
CVE-2026-121501	Low	2026-11-03	Not applicable	Proof of concept only	A vulnerability was determined in mathurvishal CloudClassroom-PHP-Project. The affected element is the function session_regenerate_id of the file loginlinkadmin.php. Executing a manipulation of the argument PHPSESSID can lead to session fixiation. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The vendor was contacted early about this disclosure but did not respond in any way.
CVE-2026-101272	Low	2026-10-28	Not applicable	No public exploit	The mechanism binding files generated during a shredding process to the authentication method is not working correctly and the same session token is used for all token-based API users. This is similar to an issue fixed in 2026.7.1 but was missed while creating the fix. Since the files are referred to by randomly generated UUIDs and only exist for a day, there is virtually no risk, but it renders the added protection mechanism useless. As part of the fix, we have also improved hardening of some other related code areas.
CVE-2026-105233	Low	2026-10-05	Not applicable	Proof of concept only	A vulnerability has been found in kishor-23 food-waste-management-system 411989e3ecb82895e53dca7865f72145f03d7d93/b3a70b2c492dc9904de5be1ad9389bd79b87f82c. This affects an unknown function of the file login.php of the component Login Flow. Such manipulation of the argument PHPSESSID leads to session fixiation. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.
CVE-2026-101268	Low	2026-09-29	Not applicable	No public exploit	If an attacker is able to convince a victim on a specially crafted link, the victim is logged in to the attacker's customer account. If the victim does not notice this, this might lead to their order details being stored into the attacker's account. The attack only works when the event is available on a different domain than the organizer page.
CVE-2026-95828	Low	2026-09-22	Not applicable	Proof of concept only	A vulnerability was determined in Mstfakts College-Management-System. This affects the function session_start of the file Front-end/server.php of the component Authentication. Executing a manipulation can lead to session fixiation. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The project was informed of the problem early through an issue report but has not responded yet.
CVE-2026-81181	Low	2026-09-18	Not applicable	No public exploit	SysReptor is a fully customizable pentest reporting platform. Prior to 2026.68, the password authentication flow for protected shared notes does not rotate the session identifier after successful authentication, allowing session fixation. An attacker who can obtain an unauthenticated SysReptor session cookie, place it in a victim's browser, and know the shared-note URL where the victim authenticates can reuse the fixed session after the victim enters the correct password and access that shared note. The main SysReptor login flow is not affected. This issue is fixed in version 2026.68.
CVE-2026-86674	Low	2026-09-08	Not applicable	Proof of concept only	A vulnerability was found in ningzichun Student Management System up to 98760f5711cf6dc8b4adca53a9e207ca49b02ebf. Affected by this vulnerability is the function session_start of the file login.php. The manipulation results in session fixiation. The attack can be launched remotely. The exploit has been made public and could be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.
CVE-2026-86279	Low	2026-09-07	Not applicable	Proof of concept only	A vulnerability was determined in SourceCodester Syllabus-Aligned Learning Management & Examination System 1.0. The impacted element is an unknown function of the file auth_process.php of the component Login. This manipulation causes session fixiation. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.
CVE-2026-14609	Low	2026-07-03	Not applicable	No public exploit	A vulnerability was detected in SourceCodester CET Automated Grading System with AI Predictive Analytics 1.0. This issue affects some unknown processing. The manipulation results in session fixiation. The attack can be executed remotely. The attack requires a high level of complexity. The exploitability is assessed as difficult. The exploit is now public and may be used.
CVE-2026-11335	Low	2026-06-05	Not applicable	Proof of concept only	A flaw has been found in tittuvarghese CollegeManagementSystem 3e476335cfbfb9a049e09f474c7ec885f69a9df3/a38852979f7e27ae67b610dce5979500ef8ebe01. This impacts the function session_start of the file /login-form.php. Executing a manipulation of the argument UserAuthData can lead to session fixiation. The attack can be launched remotely. The exploit has been published and may be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.
CVE-2026-34454	Low	2026-04-14	Not applicable	No public exploit	OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. A regression introduced in 7.11.0 prevents OAuth2 Proxy from clearing the session cookie when rendering the sign-in page. In deployments that rely on the sign-in page as part of their logout flow, a user may be shown the sign-in page while the existing session cookie remains valid, meaning the browser session is not actually logged out. On shared workstations or devices, a subsequent user could continue to use the previous user's authenticated session. Deployments that use a dedicated logout/sign-out endpoint to terminate sessions are not affected. This issue is fixed in 7.15.2
CVE-2025-43516	Low	2025-12-12	Not applicable	No public exploit	A session management issue was addressed with improved checks. This issue is fixed in macOS Sequoia 15.7.3, macOS Sonoma 14.8.3, macOS Tahoe 26.2. A user with Voice Control enabled may be able to transcribe another user's activity.
CVE-2025-65681	Low	2025-11-26	Not applicable	Proof of concept only	An issue was discovered in Overhang.IO (tutor-open-edx) (overhangio/tutor) 20.0.2 allowing local unauthorized attackers to gain access to sensitive information due to the absence of proper cache-control HTTP headers and client-side session checks.
CVE-2025-56746	Low	2025-10-15	Not applicable	Proof of concept only	Creativeitem Academy LMS up to and including 5.13 does not regenerate session IDs upon successful authentication, enabling session fixation attacks where attackers can hijack user sessions by predetermining session identifiers.
CVE-2025-8517	Low	2025-08-04	Not applicable	Proof of concept only	A vulnerability was detected in givanz Vvveb 1.0.6.1. Impacted is an unknown function. The manipulation results in session fixiation. The attack can be launched remotely. The exploit is now public and may be used. Upgrading to version 1.0.7 is recommended to address this issue. The patch is identified as d4b1e030066417b77d15b4ac505eed5ae7bf2c5e. You should upgrade the affected component.
CVE-2025-0253	Low	2025-07-25	Not applicable	No public exploit	HCL IEM is affected by a cookie attribute not set vulnerability due to inconsistency of certain security-related configurations which could increase exposure to potential vulnerabilities.
CVE-2024-49709	Low	2025-04-14	Not applicable	No public exploit	Internet Starter, one of SoftCOM iKSORIS system modules, allows for setting an arbitrary session cookie value. An attacker with an access to user's browser might set such a cookie, wait until the user logs in and then use the same cookie to take over the account. Moreover, the system does not destroy the old sessions when creating new ones, what expands the time frame in which an attack might be performed. This vulnerability has been patched in version 79.0
CVE-2024-0351	Low	2024-01-09	Not applicable	Proof of concept only	A vulnerability classified as problematic has been found in SourceCodester Engineers Online Portal 1.0. This affects an unknown part. The manipulation leads to session fixiation. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250119.
CVE-2020-4243	Low	2020-08-05	Not applicable	No public exploit	IBM Security Identity Governance and Intelligence 5.2.6 Virtual Appliance could allow a remote attacker to obtain sensitive information using man in the middle techniques due to not properly invalidating session tokens. IBM X-Force ID: 175420.
CVE-2020-6824	Low	2020-04-24	Not applicable	No public exploit	Initially, a user opens a Private Browsing Window and generates a password for a site, then closes the Private Browsing Window but leaves Firefox open. Subsequently, if the user had opened a new Private Browsing Window, revisited the same site, and generated a new password - the generated passwords would have been identical, rather than independent. This vulnerability affects Firefox < 75.
CVE-2018-1804	Low	2018-12-13	Not applicable	No public exploit	IBM Security Access Manager Appliance 9.0.1.0, 9.0.2.0, 9.0.3.0, 9.0.4.0, and 9.0.5.0 does not set the secure attribute on authorization tokens or session cookies. This could allow an attacker to obtain sensitive information using man in the middle techniques. IBM X-Force ID: 149703.
CVE-2018-1484	Low	2018-12-12	Not applicable	No public exploit	IBM BigFix Platform 9.2.0 through 9.2.14 and 9.5 through 9.5.9 does not set the secure attribute on authorization tokens or session cookies. Attackers may be able to get the cookie values by sending a http:// link to a user or by planting this link in a site the user goes to. The cookie will be sent to the insecure link and the attacker can then obtain the cookie value by snooping the traffic. IBM X-Force ID: 140969.
CVE-2018-16463	Low	2018-10-30	Not applicable	No public exploit	A bug causing session fixation in Nextcloud Server prior to 14.0.0, 13.0.3 and 12.0.8 could potentially allow an attacker to obtain access to password protected shares.
CVE-2018-11567	Low	2018-05-30	Not applicable	No public exploit	Prior to 2018-04-27, the reprompt feature in Amazon Echo devices could be misused by a custom Alexa skill. The reprompt feature is designed so that if Alexa does not receive an input within 8 seconds, the device can speak a reprompt, then wait an additional 8 seconds for input; if the user still does not respond, the microphone is then turned off. The vulnerability involves empty output-speech reprompts, custom wildcard ("gibberish") input slots, and logging of detected speech. If a maliciously designed skill is installed, an attacker could obtain transcripts of speech not intended for Alexa to process, but simply spoken within the device's hearing range. NOTE: The vendor states "Customer trust is important to us and we take security and privacy seriously. We have put mitigations in place for detecting this type of skill behavior and reject or suppress those skills when we do. Customers do not need to take any action for these mitigations to work.
CVE-2017-1270	Low	2017-12-20	Not applicable	No public exploit	IBM Security Guardium 10.0 does not renew a session variable after a successful authentication which could lead to session fixation/hijacking vulnerability. This could force a user to utilize a cookie that may be known to an attacker. IBM X-Force ID: 124745.
CVE-2017-0892	Low	2017-05-08	Not applicable	No public exploit	Nextcloud Server before 11.0.3 is vulnerable to an improper session handling allowed an application specific password without permission to the files access to the users file.
CVE-2016-9703	Low	2017-02-01	Not applicable	No public exploit	IBM Security Identity Manager Virtual Appliance does not invalidate session tokens which could allow an unauthorized user with physical access to the work station to obtain sensitive information.
CVE-2001-1534	Low	2001-12-31	Not applicable	No public exploit	mod_usertrack in Apache 1.3.11 through 1.3.20 generates session ID's using predictable information including host IP address, system time and server process ID, which allows local users to obtain session ID's and bypass authentication when these session ID's are used for authentication.

CVE

Severity

Published▾

Status

Exploitation

Description

CVE-2026-125078

Low

2026-11-10

Not applicable

Proof of concept only

A security flaw has been discovered in SourceCodester Smart Attendance System with QR Code Scanner 1.0. This affects an unknown part of the file login.php. The manipulation results in session fixiation. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.

CVE-2026-121501

Low

2026-11-03

Not applicable

Proof of concept only

A vulnerability was determined in mathurvishal CloudClassroom-PHP-Project. The affected element is the function session_regenerate_id of the file loginlinkadmin.php. Executing a manipulation of the argument PHPSESSID can lead to session fixiation. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The vendor was contacted early about this disclosure but did not respond in any way.

CVE-2026-101272

Low

2026-10-28

Not applicable

No public exploit

The mechanism binding files generated during a shredding process to the authentication method is not working correctly and the same session token is used for all token-based API users. This is similar to an issue fixed in 2026.7.1 but was missed while creating the fix. Since the files are referred to by randomly generated UUIDs and only exist for a day, there is virtually no risk, but it renders the added protection mechanism useless. As part of the fix, we have also improved hardening of some other related code areas.

CVE-2026-105233

Low

2026-10-05

Not applicable

Proof of concept only

A vulnerability has been found in kishor-23 food-waste-management-system 411989e3ecb82895e53dca7865f72145f03d7d93/b3a70b2c492dc9904de5be1ad9389bd79b87f82c. This affects an unknown function of the file login.php of the component Login Flow. Such manipulation of the argument PHPSESSID leads to session fixiation. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.

CVE-2026-101268

Low

2026-09-29

Not applicable

No public exploit

If an attacker is able to convince a victim on a specially crafted link, the victim is logged in to the attacker's customer account. If the victim does not notice this, this might lead to their order details being stored into the attacker's account. The attack only works when the event is available on a different domain than the organizer page.

CVE-2026-95828

Low

2026-09-22

Not applicable

Proof of concept only

A vulnerability was determined in Mstfakts College-Management-System. This affects the function session_start of the file Front-end/server.php of the component Authentication. Executing a manipulation can lead to session fixiation. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The project was informed of the problem early through an issue report but has not responded yet.

CVE-2026-81181

Low

2026-09-18

Not applicable

No public exploit

SysReptor is a fully customizable pentest reporting platform. Prior to 2026.68, the password authentication flow for protected shared notes does not rotate the session identifier after successful authentication, allowing session fixation. An attacker who can obtain an unauthenticated SysReptor session cookie, place it in a victim's browser, and know the shared-note URL where the victim authenticates can reuse the fixed session after the victim enters the correct password and access that shared note. The main SysReptor login flow is not affected. This issue is fixed in version 2026.68.

CVE-2026-86674

Low

2026-09-08

Not applicable

Proof of concept only

A vulnerability was found in ningzichun Student Management System up to 98760f5711cf6dc8b4adca53a9e207ca49b02ebf. Affected by this vulnerability is the function session_start of the file login.php. The manipulation results in session fixiation. The attack can be launched remotely. The exploit has been made public and could be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.

CVE-2026-86279

Low

2026-09-07

Not applicable

Proof of concept only

A vulnerability was determined in SourceCodester Syllabus-Aligned Learning Management & Examination System 1.0. The impacted element is an unknown function of the file auth_process.php of the component Login. This manipulation causes session fixiation. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.

CVE-2026-14609

Low

2026-07-03

Not applicable

No public exploit

A vulnerability was detected in SourceCodester CET Automated Grading System with AI Predictive Analytics 1.0. This issue affects some unknown processing. The manipulation results in session fixiation. The attack can be executed remotely. The attack requires a high level of complexity. The exploitability is assessed as difficult. The exploit is now public and may be used.

CVE-2026-11335

Low

2026-06-05

Not applicable

Proof of concept only

A flaw has been found in tittuvarghese CollegeManagementSystem 3e476335cfbfb9a049e09f474c7ec885f69a9df3/a38852979f7e27ae67b610dce5979500ef8ebe01. This impacts the function session_start of the file /login-form.php. Executing a manipulation of the argument UserAuthData can lead to session fixiation. The attack can be launched remotely. The exploit has been published and may be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.

CVE-2026-34454

Low

2026-04-14

Not applicable

No public exploit

OAuth2 Proxy is a reverse proxy that provides authentication using OAuth2 providers. A regression introduced in 7.11.0 prevents OAuth2 Proxy from clearing the session cookie when rendering the sign-in page. In deployments that rely on the sign-in page as part of their logout flow, a user may be shown the sign-in page while the existing session cookie remains valid, meaning the browser session is not actually logged out. On shared workstations or devices, a subsequent user could continue to use the previous user's authenticated session. Deployments that use a dedicated logout/sign-out endpoint to terminate sessions are not affected. This issue is fixed in 7.15.2

CVE-2025-43516

Low

2025-12-12

Not applicable

No public exploit

A session management issue was addressed with improved checks. This issue is fixed in macOS Sequoia 15.7.3, macOS Sonoma 14.8.3, macOS Tahoe 26.2. A user with Voice Control enabled may be able to transcribe another user's activity.

CVE-2025-65681

Low

2025-11-26

Not applicable

Proof of concept only

An issue was discovered in Overhang.IO (tutor-open-edx) (overhangio/tutor) 20.0.2 allowing local unauthorized attackers to gain access to sensitive information due to the absence of proper cache-control HTTP headers and client-side session checks.

CVE-2025-56746

Low

2025-10-15

Not applicable

Proof of concept only

Creativeitem Academy LMS up to and including 5.13 does not regenerate session IDs upon successful authentication, enabling session fixation attacks where attackers can hijack user sessions by predetermining session identifiers.

CVE-2025-8517

Low

2025-08-04

Not applicable

Proof of concept only

A vulnerability was detected in givanz Vvveb 1.0.6.1. Impacted is an unknown function. The manipulation results in session fixiation. The attack can be launched remotely. The exploit is now public and may be used. Upgrading to version 1.0.7 is recommended to address this issue. The patch is identified as d4b1e030066417b77d15b4ac505eed5ae7bf2c5e. You should upgrade the affected component.

CVE-2025-0253

Low

2025-07-25

Not applicable

No public exploit

HCL IEM is affected by a cookie attribute not set vulnerability due to inconsistency of certain security-related configurations which could increase exposure to potential vulnerabilities.

CVE-2024-49709

Low

2025-04-14

Not applicable

No public exploit

Internet Starter, one of SoftCOM iKSORIS system modules, allows for setting an arbitrary session cookie value. An attacker with an access to user's browser might set such a cookie, wait until the user logs in and then use the same cookie to take over the account. Moreover, the system does not destroy the old sessions when creating new ones, what expands the time frame in which an attack might be performed. This vulnerability has been patched in version 79.0

CVE-2024-0351

Low

2024-01-09

Not applicable

Proof of concept only

A vulnerability classified as problematic has been found in SourceCodester Engineers Online Portal 1.0. This affects an unknown part. The manipulation leads to session fixiation. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-250119.

CVE-2020-4243

Low

2020-08-05

Not applicable

No public exploit

IBM Security Identity Governance and Intelligence 5.2.6 Virtual Appliance could allow a remote attacker to obtain sensitive information using man in the middle techniques due to not properly invalidating session tokens. IBM X-Force ID: 175420.

CVE-2020-6824

Low

2020-04-24

Not applicable

No public exploit

Initially, a user opens a Private Browsing Window and generates a password for a site, then closes the Private Browsing Window but leaves Firefox open. Subsequently, if the user had opened a new Private Browsing Window, revisited the same site, and generated a new password - the generated passwords would have been identical, rather than independent. This vulnerability affects Firefox < 75.

CVE-2018-1804

Low

2018-12-13

Not applicable

No public exploit

IBM Security Access Manager Appliance 9.0.1.0, 9.0.2.0, 9.0.3.0, 9.0.4.0, and 9.0.5.0 does not set the secure attribute on authorization tokens or session cookies. This could allow an attacker to obtain sensitive information using man in the middle techniques. IBM X-Force ID: 149703.

CVE-2018-1484

Low

2018-12-12

Not applicable

No public exploit

IBM BigFix Platform 9.2.0 through 9.2.14 and 9.5 through 9.5.9 does not set the secure attribute on authorization tokens or session cookies. Attackers may be able to get the cookie values by sending a http:// link to a user or by planting this link in a site the user goes to. The cookie will be sent to the insecure link and the attacker can then obtain the cookie value by snooping the traffic. IBM X-Force ID: 140969.

CVE-2018-16463

Low

2018-10-30

Not applicable

No public exploit

A bug causing session fixation in Nextcloud Server prior to 14.0.0, 13.0.3 and 12.0.8 could potentially allow an attacker to obtain access to password protected shares.

CVE-2018-11567

Low

2018-05-30

Not applicable

No public exploit

Prior to 2018-04-27, the reprompt feature in Amazon Echo devices could be misused by a custom Alexa skill. The reprompt feature is designed so that if Alexa does not receive an input within 8 seconds, the device can speak a reprompt, then wait an additional 8 seconds for input; if the user still does not respond, the microphone is then turned off. The vulnerability involves empty output-speech reprompts, custom wildcard ("gibberish") input slots, and logging of detected speech. If a maliciously designed skill is installed, an attacker could obtain transcripts of speech not intended for Alexa to process, but simply spoken within the device's hearing range. NOTE: The vendor states "Customer trust is important to us and we take security and privacy seriously. We have put mitigations in place for detecting this type of skill behavior and reject or suppress those skills when we do. Customers do not need to take any action for these mitigations to work.

CVE-2017-1270

Low

2017-12-20

Not applicable

No public exploit

IBM Security Guardium 10.0 does not renew a session variable after a successful authentication which could lead to session fixation/hijacking vulnerability. This could force a user to utilize a cookie that may be known to an attacker. IBM X-Force ID: 124745.

CVE-2017-0892

Low

2017-05-08

Not applicable

No public exploit

Nextcloud Server before 11.0.3 is vulnerable to an improper session handling allowed an application specific password without permission to the files access to the users file.

CVE-2016-9703

Low

2017-02-01

Not applicable

No public exploit

IBM Security Identity Manager Virtual Appliance does not invalidate session tokens which could allow an unauthorized user with physical access to the work station to obtain sensitive information.

CVE-2001-1534

Low

2001-12-31

Not applicable

No public exploit

mod_usertrack in Apache 1.3.11 through 1.3.20 generates session ID's using predictable information including host IP address, system time and server process ID, which allows local users to obtain session ID's and bypass authentication when these session ID's are used for authentication.