Medium severity6.1NVD Advisory· Published Nov 26, 2025· Updated Jun 17, 2026
CVE-2025-66021
CVE-2025-66021
Description
OWASP Java HTML Sanitizer is a configureable HTML Sanitizer written in Java, allowing inclusion of HTML authored by third-parties in web applications while protecting against XSS. In version 20240325.1, OWASP java html sanitizer is vulnerable to XSS if HtmlPolicyBuilder allows noscript and style tags with allowTextIn inside the style tag. This could lead to XSS if the payload is crafted in such a way that it does not sanitise the CSS and allows tags which is not mentioned in HTML policy. At time of publication no known patch is available.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
com.googlecode.owasp-java-html-sanitizer:owasp-java-html-sanitizerMaven | >= 20240325.1, < 20260101.1 | 20260101.1 |
Affected products
24cpe:2.3:a:owasp:java_html_sanitizer:20240325.1:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:owasp:java_html_sanitizer:20240325.1:*:*:*:*:*:*:*
- (no CPE)range: = 20240325.1
- osv-coords22 versionspkg:apk/chainguard/keycloak-26.2-compatpkg:apk/chainguard/keycloak-26.3pkg:apk/chainguard/keycloak-26.3-compatpkg:apk/chainguard/keycloak-26.3-iamguarded-compatpkg:apk/chainguard/keycloak-26.4pkg:apk/chainguard/keycloak-26.4-compatpkg:apk/chainguard/keycloak-26.4-iamguarded-compatpkg:apk/chainguard/keycloak-26.4-operatorpkg:apk/chainguard/keycloak-26.4-operator-compatpkg:apk/chainguard/keycloak-fips-26.3-operatorpkg:apk/chainguard/keycloak-fips-26.3-operator-compatpkg:apk/chainguard/keycloak-fips-26.4-operatorpkg:apk/chainguard/keycloak-fips-26.4-operator-compatpkg:apk/wolfi/keycloak-26.3pkg:apk/wolfi/keycloak-26.3-compatpkg:apk/wolfi/keycloak-26.3-iamguarded-compatpkg:apk/wolfi/keycloak-26.4pkg:apk/wolfi/keycloak-26.4-compatpkg:apk/wolfi/keycloak-26.4-iamguarded-compatpkg:apk/wolfi/keycloak-26.4-operatorpkg:apk/wolfi/keycloak-26.4-operator-compatpkg:maven/com.googlecode.owasp-java-html-sanitizer/owasp-java-html-sanitizer
< 26.2.5-r6+ 21 more
- (no CPE)range: < 26.2.5-r6
- (no CPE)range: < 26.3.5-r7
- (no CPE)range: < 26.3.5-r4
- (no CPE)range: < 26.3.5-r7
- (no CPE)range: < 26.4.7-r3
- (no CPE)range: < 26.4.6-r0
- (no CPE)range: < 26.4.7-r3
- (no CPE)range: < 26.4.6-r0
- (no CPE)range: < 26.4.6-r0
- (no CPE)range: < 26.3.5-r4
- (no CPE)range: < 26.3.5-r4
- (no CPE)range: < 26.4.6-r0
- (no CPE)range: < 26.4.6-r0
- (no CPE)range: < 26.3.5-r7
- (no CPE)range: < 26.3.5-r4
- (no CPE)range: < 26.3.5-r7
- (no CPE)range: < 26.4.7-r3
- (no CPE)range: < 26.4.6-r0
- (no CPE)range: < 26.4.7-r3
- (no CPE)range: < 26.4.6-r0
- (no CPE)range: < 26.4.6-r0
- (no CPE)range: >= 20240325.1, < 20260101.1
Patches
Vulnerability mechanics
References
7- github.com/OWASP/java-html-sanitizer/security/advisories/GHSA-g9gq-3pfx-2gw2nvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-g9gq-3pfx-2gw2ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2025-66021ghsaADVISORY
- github.com/OWASP/java-html-sanitizer/commit/4149cf02ba84db13e8e9d7ee1b01b3f47238e072ghsaWEB
- github.com/OWASP/java-html-sanitizer/commit/b98cdf1cd5e156a6259b01aa8cdc7372c6efde1eghsaWEB
- github.com/OWASP/java-html-sanitizer/commit/d6e0463ed3b48777ecd187913ffdbe767508ff45ghsaWEB
- github.com/OWASP/java-html-sanitizer/issues/363ghsaWEB
News mentions
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