`CVE-2021-42575` OWASP Java HTML Sanitizer

Affected software	OWASP Java HTML Sanitizer
Severity	9.8 Critical CVSS 3.1 2 scores
Fixed in	`20211018.1`
Weakness	Improper input validation (CWE-20)
Published	18 Oct 2021
Updated	17 Jun 2026

Description

The OWASP Java HTML Sanitizer before 20211018.1 does not properly enforce policies associated with the SELECT, STYLE, and OPTION elements.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 5 years ago.

CISA KEV not listed
VulnCheck KEV not listed
CISA Vulnrichment no assessment published
Indexed PoC none indexed
EPSS 3.0% chance in 30 days

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

Protection full
Action available security rule
Review human Researcher
Record active

Decided by	Manual classification of this CVE in the legacy dataset
Finding	A manual classification set this CVE's status to Protected by Waratek.

Decided by

Manual classification of this CVE in the legacy dataset

Finding

A manual classification set this CVE's status to Protected by Waratek.

How to mitigate CVE-2021-42575

Upgrade OWASP Java HTML Sanitizer to 20211018.1 or later. Until you can, Waratek RASP blocks exploitation with a security rule that blocks this kind of attack. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

CVSS

9.8 CRITICAL v3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H 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 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H NVD Primary published

CVSS 2.0 7.5 none AV:N/AC:L/Au:N/C:P/I:P/A:P NVD Primary

Version	Score	Band	Vector	Assigner	Type
CVSS 3.1	9.8	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`	NVD	Primary	published
CVSS 2.0	7.5	none	`AV:N/AC:L/Au:N/C:P/I:P/A:P`	NVD	Primary

Affected software and releases

Oracle advisories

Advisory	Type	Quarter	Products Oracle names in its risk matrix
Oracle Critical Patch Update July 2025 ↗	CPU	2025-Q3	Oracle Supply Chain / Web Client (Java HTML Sanitizer) (9.3.6)
Oracle Critical Patch Update January 2024 ↗	CPU	2024-Q1	Oracle Hyperion / Hub (Java HTML Sanitizer) (11.2.14.0.000)
Oracle Critical Patch Update July 2023 ↗	CPU	2023-Q3	Oracle Communications Applications / Configuration (Java HTML Sanitizer) (3.0.3.2) Oracle Fusion Middleware / ADF Faces (Java HTML Sanitizer) (12.2.1.4.0)
Oracle Critical Patch Update April 2023 ↗	CPU	2023-Q2	Oracle Commerce / Platform (OWASP Java HTML Sanitizer ) (11.3.0, 11.3.1, 11.3.2)
Oracle Critical Patch Update July 2022 ↗	CPU	2022-Q3	Oracle Fusion Middleware / Third Party Patch (AntiSamy) (12.2.1.3.0, 12.2.1.4.0)
Oracle Critical Patch Update January 2022 ↗	CPU	2022-Q1	Oracle Construction and Engineering / Platform, Data Persistence (OWASP Java HTML Sanitizer) (17.7-17.12, 18.8, 19.12, 20.12, 21.12)

Advisory

Type

Quarter

Products Oracle names in its risk matrix

Oracle Critical Patch Update July 2025 ↗

CPU

2025-Q3

Oracle Supply Chain / Web Client (Java HTML Sanitizer) (9.3.6)

Oracle Critical Patch Update January 2024 ↗

CPU

2024-Q1

Oracle Hyperion / Hub (Java HTML Sanitizer) (11.2.14.0.000)

Oracle Critical Patch Update July 2023 ↗

CPU

2023-Q3

Oracle Communications Applications / Configuration (Java HTML Sanitizer) (3.0.3.2)
Oracle Fusion Middleware / ADF Faces (Java HTML Sanitizer) (12.2.1.4.0)

Oracle Critical Patch Update April 2023 ↗

CPU

2023-Q2

Oracle Commerce / Platform (OWASP Java HTML Sanitizer ) (11.3.0, 11.3.1, 11.3.2)

Oracle Critical Patch Update July 2022 ↗

CPU

2022-Q3

Oracle Fusion Middleware / Third Party Patch (AntiSamy) (12.2.1.3.0, 12.2.1.4.0)

Oracle Critical Patch Update January 2022 ↗

CPU

2022-Q1

Oracle Construction and Engineering / Platform, Data Persistence (OWASP Java HTML Sanitizer) (17.7-17.12, 18.8, 19.12, 20.12, 21.12)

Oracle components and versions

Family	Component	Versions, as Oracle lists them	Read as
Oracle Commerce	Platform (OWASP Java HTML Sanitizer )	11.3.0, 11.3.1, 11.3.2	11.3.0 · 11.3.1 · 11.3.2
Oracle Communications Applications	Configuration (Java HTML Sanitizer)	3.0.3.2	3.0.3.2
Oracle Construction and Engineering	Platform, Data Persistence (OWASP Java HTML Sanitizer)	17.7-17.12, 18.8, 19.12, 20.12, 21.12	18.8 · 19.12 · 20.12 · 21.12
Oracle Fusion Middleware	ADF Faces (Java HTML Sanitizer)	12.2.1.4.0	12.2.1.4.0
Oracle Fusion Middleware	Third Party Patch (AntiSamy)	12.2.1.3.0, 12.2.1.4.0	12.2.1.3.0 · 12.2.1.4.0
Oracle Hyperion	Hub (Java HTML Sanitizer)	11.2.14.0.000	11.2.14.0.0
Oracle Supply Chain	Web Client (Java HTML Sanitizer)	9.3.6	9.3.6

Family

Component

Versions, as Oracle lists them

Read as

Oracle Commerce

Platform (OWASP Java HTML Sanitizer )

11.3.0, 11.3.1, 11.3.2

11.3.0 · 11.3.1 · 11.3.2

Oracle Communications Applications

Configuration (Java HTML Sanitizer)

3.0.3.2

Oracle Construction and Engineering

Platform, Data Persistence (OWASP Java HTML Sanitizer)

17.7-17.12, 18.8, 19.12, 20.12, 21.12

18.8 · 19.12 · 20.12 · 21.12

Oracle Fusion Middleware

ADF Faces (Java HTML Sanitizer)

12.2.1.4.0

Oracle Fusion Middleware

Third Party Patch (AntiSamy)

12.2.1.3.0, 12.2.1.4.0

12.2.1.3.0 · 12.2.1.4.0

Oracle Hyperion

Hub (Java HTML Sanitizer)

11.2.14.0.000

11.2.14.0.0

Oracle Supply Chain

Web Client (Java HTML Sanitizer)

9.3.6

Maven packages

Affected and fixed versions, from OSV.dev

Package Introduced Fixed Last affected

com.googlecode.owasp-java-html-sanitizer:owasp-java-html-sanitizer 0 20211018.1 unbounded

Package	Introduced	Fixed	Last affected
`com.googlecode.owasp-java-html-sanitizer:owasp-java-html-sanitizer`	0	`20211018.1`	unbounded

Products and versions

4 products, 9 version entries

Source	Vendor	Product	Scheme	Affected versions
osv	com.googlecode.owasp-java-html-sanitizer	owasp-java-html-sanitizer	generic	＜ 99999.1
nvd	oracle	middleware common libraries and tools	generic	12.2.1.3.0 · 12.2.1.4.0
nvd	oracle	primavera unifier	generic	≥ 17.7 and ≤ 17.12 · 18.8 · 19.12 · 20.12 · 21.12
nvd	owasp	java html sanitizer	generic	＜ 99999.2

Source

Vendor

Product

Scheme

Affected versions

osv

com.googlecode.owasp-java-html-sanitizer

owasp-java-html-sanitizer

generic

＜ 99999.1

nvd

oracle

middleware common libraries and tools

generic

12.2.1.3.0 · 12.2.1.4.0

nvd

oracle

primavera unifier

generic

≥ 17.7 and ≤ 17.12 · 18.8 · 19.12 · 20.12 · 21.12

nvd

owasp

java html sanitizer

generic

＜ 99999.2

Earlier manual review

A reviewer classified this CVE in an older dataset. We kept the labels and products below, but not the reviewer's reasoning.

## Manual Classification Context **Labels:** HTTP, PLATFORM, NO AUTH REMOTE EXPLOIT, DATA PERSISTENCE (OWASP JAVA HTML SANITIZER) **Products:** PRIMAVERA UNIFIER, ORACLE CONSTRUCTION AND ENGINEERING

References

URL	Tags
https://docs.google.com/document/d/11SoX296sMS0XoQiQbpxc5pNxSdbJKDJkm5BDv0zrX50	WEB
https://www.oracle.com/security-alerts/cpujan2022.html	WEB
https://www.oracle.com/security-alerts/cpujul2022.html	WEB
https://docs.google.com/document/d/11SoX296sMS0XoQiQbpxc5pNxSdbJKDJkm5BDv0zrX50/	Exploit, Third Party Advisory

URL

Timeline

Published	2021-10-18	By the CVE Program.
NVD record modified	2026-06-17	NVD's own last-modified date for this record.

Published

2021-10-18

By the CVE Program.

NVD record modified

2026-06-17

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

How VRT decided (5 of 24 rules ran)

5 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 decided it matched Protected by Waratek Found in legacy manual classifications

6 non-java-upstream not reached A root cause in non-Java code: an OS kernel, a C library, or a bundled runtime

7 oracle-component not reached 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 not reached 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 not reached An OSV.dev record of this CVE affecting a package published to Maven Central. When every such package is one business applications do not use (Minecraft mods and launchers, Fastjson) and no tracked product is named by CPE, it settles the CVE as Outside Waratek scope instead

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 not reached A reference pointing at the upstream fix: a commit, a PR, a Red Hat bug

18 open-source-maven not reached The affected package being open source on Maven, so the fix can be read

19 poc-derivable not reached An indexed exploit clearing the evidence bar to reverse-engineer, where there is no source to read

20 no-exploit not reached 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 not reached A vulnerability class already blocked by an ARMR security rule

22 exploited-no-fix-or-poc not reached 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 not reached Medium or Low severity, no CISA or VulnCheck KEV listing, no PoC clearing the evidence bar, no CISA verdict, no Oracle advisory

24 no-exploit-published not reached Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all

NVD ↗ · CVE.org ↗