`CVE-2020-10770` Keycloak

Affected software	Keycloak
Severity	5.3 Medium CVSS 3.1 2 scores
Fixed in	`13.0.0`
Weakness	Server-side request forgery (CWE-918)
Published	15 Dec 2020
Updated	17 Jun 2026

Description

A flaw was found in Keycloak before 13.0.0, where it is possible to force the server to call out an unverified URL using the OIDC parameter request_uri. This flaw allows an attacker to use this parameter to execute a Server-side request forgery (SSRF) attack.

CWE-601

Exploitation status

Exploited

Real-world exploitation reported by VulnCheck KEV. CISA has not confirmed it.

CISA KEV not listed
VulnCheck KEV listed Exploitation reported in the wild. Honeypot sightings · 3 exploits · earliest 2024-01-22.
CISA Vulnrichment no assessment published
Indexed PoC 4 indexed Published artifacts you can open, in Exploit-DB, GitHub PoC, Nuclei; first seen 2021-10-13.
EPSS 70% chance in 30 days A model's forecast, not a report of exploitation. Higher than 99% of all scored CVEs.

VulnCheck KEV

Exploitation evidence from VulnCheck Known Exploited Vulnerabilities (VulnCheck KEV), used under VulnCheck's community terms. View CVE-2020-10770 in VulnCheck (free account).

Evidence	Source	Detail	Date
Honeypot sighting	Shadowserver honeypots	Exploitation attempts seen on 233 days	2024-01-22 to 2026-10-02
Exploit reference	VulnCheck XDB 5cdd58213a9a	Exploit type: initial-access	2021-10-13
Exploit reference	VulnCheck XDB 82c0a02ffc14	Exploit type: infoleak	2023-12-21
Exploit reference	VulnCheck XDB 22880fbf960a	Exploit type: info-leak	2026-09-07

Evidence

Source

Detail

Date

Honeypot sighting

Shadowserver honeypots

Exploitation attempts seen on 233 days

2024-01-22 to 2026-10-02

Exploit reference

VulnCheck XDB 5cdd58213a9a

Exploit type: initial-access

2021-10-13

Exploit reference

VulnCheck XDB 82c0a02ffc14

Exploit type: infoleak

2023-12-21

Exploit reference

VulnCheck XDB 22880fbf960a

Exploit type: info-leak

2026-09-07

1 of these are GitHub repositories with fewer than 5 stars. They are listed for reference and don't count toward the exploitation status above.

Index	Artifact	Stars	First seen
GitHub PoC	Keycloak 12.0.1 - 'request_uri ' Blind Server-Side Request Forgery (SSRF) (Unauthenticated)	9	2021-10-13
GitHub PoC	Keycloak Blind SSRF POC	2	2026-09-05
Exploit-DB	Keycloak 12.0.1 - 'request_uri ' Blind Server-Side Request Forgery (SSRF) (Unauthenticated)		2021-10-13
Nuclei	Keycloak <= 12.0.1 - request_uri Blind Server-Side Request Forgery (SSRF)

Index

Artifact

Stars

First seen

GitHub PoC

Keycloak 12.0.1 - 'request_uri ' Blind Server-Side Request Forgery (SSRF) (Unauthenticated)

2021-10-13

GitHub PoC

Keycloak Blind SSRF POC

2026-09-05

Exploit-DB

Keycloak 12.0.1 - 'request_uri ' Blind Server-Side Request Forgery (SSRF) (Unauthenticated)

2021-10-13

Nuclei

Keycloak <= 12.0.1 - request_uri Blind Server-Side Request Forgery (SSRF)

Waratek protection

Mitigation candidate

A kind of vulnerability Waratek's rules address, with exploit code published or exploitation reported. No rule exists and none is planned yet. The decision below says what we found to build a rule from.

Protection none
Action unverified
Review automated Inferred
Record active

Decided by	A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug
Finding	A Red Hat Bugzilla ticket (https://bugzilla.redhat.com/show_bug.cgi?id=1846270) tracks the fix. That makes this CVE a candidate for an ARMR patch rule. No rule exists and none is scheduled: whether one can be derived depends on reading the upstream change the ticket links.
Candidate fix	https://bugzilla.redhat.com/show_bug.cgi?id=1846270 : a Red Hat bug: the triage, which links onward to the fix

Decided by

A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug

Finding

A Red Hat Bugzilla ticket (https://bugzilla.redhat.com/show_bug.cgi?id=1846270) tracks the fix. That makes this CVE a candidate for an ARMR patch rule. No rule exists and none is scheduled: whether one can be derived depends on reading the upstream change the ticket links.

Candidate fix

https://bugzilla.redhat.com/show_bug.cgi?id=1846270 : a Red Hat bug: the triage, which links onward to the fix

CVSS

5.3 MEDIUM v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

Version Score Band Vector Assigner Type

CVSS 3.1 5.3 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N NVD Primary published

CVSS 2.0 5.0 none AV:N/AC:L/Au:N/C:N/I:P/A:N NVD Primary

Version	Score	Band	Vector	Assigner	Type
CVSS 3.1	5.3	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`	NVD	Primary	published
CVSS 2.0	5.0	none	`AV:N/AC:L/Au:N/C:N/I:P/A:N`	NVD	Primary

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev

Package Introduced Fixed Last affected

org.keycloak:keycloak-core 0 13.0.0 unbounded

Package	Introduced	Fixed	Last affected
`org.keycloak:keycloak-core`	0	`13.0.0`	unbounded

Products and versions

2 products, 2 version entries

Source	Vendor	Product	Scheme	Affected versions
osv	org.keycloak	keycloak-core	generic	＜ 13.0.0
nvd	redhat	keycloak	generic	＜ 12.0.2

Source

Vendor

Product

Scheme

Affected versions

osv

org.keycloak

keycloak-core

generic

＜ 13.0.0

nvd

redhat

keycloak

generic

＜ 12.0.2

References

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1846270	bugzilla
https://github.com/keycloak/keycloak-documentation/pull/1086	WEB
https://github.com/keycloak/keycloak/pull/7714	WEB
https://github.com/keycloak/keycloak	PACKAGE
https://issues.redhat.com/browse/KEYCLOAK-14019	WEB
https://issues.redhat.com/browse/KEYCLOAK-3426	WEB
http://packetstormsecurity.com/files/164499/Keycloak-12.0.1-Server-Side-Request-Forgery.html	WEB

URL

Timeline

Published	2020-12-15	By the CVE Program.
VulnCheck KEV: earliest evidence	2024-01-22	Date of the oldest evidence of exploitation in VulnCheck KEV's record. VulnCheck does not publish the date it listed the CVE.
NVD record modified	2026-06-17	NVD's own last-modified date for this record.
VulnCheck KEV: latest evidence	2026-10-02	Date of the newest report, exploit reference or honeypot sighting in VulnCheck KEV's record.

Published

2020-12-15

By the CVE Program.

VulnCheck KEV: earliest evidence

2024-01-22

Date of the oldest evidence of exploitation in VulnCheck KEV's record. VulnCheck does not publish the date it listed the CVE.

NVD record modified

2026-06-17

NVD's own last-modified date for this record.

VulnCheck KEV: latest evidence

2026-10-02

Date of the newest report, exploit reference or honeypot sighting in VulnCheck KEV's record.

How VRT decided (17 of 24 rules ran)

17 of 24 rules ran. The rest didn't run because an earlier rule had already settled the CVE.

# Rule Outcome Status Detail

identity: Does this identifier describe a vulnerability at all? the first rule that matches decides

1 rejected no match CVE Program withdrawal of this identifier

scope: Is it a vulnerability Waratek protects? the first rule that matches decides

2 armr-patch-file no match An ARMR patch file on disk for this CVE

3 armr-secure-rule-file no match An ARMR security-rule template on disk for this CVE

4 manual-classification no match A researcher's recorded decision for this specific CVE

5 manual classification no match Manual classification of this CVE in the legacy dataset

6 non-java-upstream no match A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component no match The defect being in a component of a tracked product the agent does not reach: JavaFX, the Java SE installer, the JInitiator browser plug-in, the native WebLogic proxy plug-in, or a native part of Oracle Application Server or Collaboration Suite (HTTP Server, Web Cache, Internet Directory, mail and calendar servers). Oracle gives these no CPE of their own and names them only in the description.

8 java-client-side no match Oracle's own risk-matrix note saying the CVE is reached only through untrusted code in the Java sandbox (applets, Web Start) or only through a client installation of Java, so a server running its own trusted code is not exposed

9 osv-maven matched In scope Maven packages: org.keycloak:keycloak-core

10 cna-maven-package not reached An affected Maven artifact named by the CNA itself

11 known-cpe-product not reached An NVD CPE naming a product ARMR tracks

12 cna-cpe-product not reached A CPE the CNA published naming a tracked product. Oracle publishes these on advisory day, months before NVD.

13 oracle-advisory-family not reached A tracked product family named in Oracle's own risk matrix. CPE cannot carry a suite name, only a module.

14 cna-named-product not reached A tracked product named in words by the CVE's own CNA, on a record with no CPE yet. Apache and Eclipse publish these on advisory day, before NVD adds CPE data.

15 non-deployable-product not reached The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached

16 unmatched-product not reached No tracked product matched above, and none present at all

disposition: What do we do about one that is? every rule runs

17 patch-hint decided it matched Mitigation candidate References include candidate fix URL (bugzilla tier): https://bugzilla.redhat.com/show_bug.cgi?id=1846270

18 open-source-maven skipped The affected package being open source on Maven, so the fix can be read

19 poc-derivable skipped An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit skipped Nothing to build a rule from yet: no published exploit, no CISA record of exploitation and no source-level change to read

21 secure-rule-match no match A vulnerability class already blocked by an ARMR security rule

22 exploited-no-fix-or-poc skipped Somebody exploiting this CVE (a CISA or VulnCheck KEV listing, or a CISA verdict of active exploitation), with no fix, source code or PoC to build a rule from

23 below-action-threshold withheld VulnCheck KEV-listed (seen by Shadowserver honeypots on 233 day(s) from 2024-01-22 to 2026-10-02) — exploitation is reported, so it requires review regardless of severity

24 no-exploit-published no match A CISA or VulnCheck KEV listing, a CISA verdict of active exploitation, a reviewed exploit catalogue, or a GitHub PoC with 5 or more stars carries this CVE — exploit code is in use or published, so it stays a candidate

Products the scope rules checked

The products this CVE's record names, and whether VRT tracks each one. The scope rules decided on these.

Vendor Product Tracked CPE Source

redhat keycloak tracked cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:* yaml

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