CVE-2025-66021
OWASP Java HTML Sanitizer is vulnerable to XSS via noscript tag and improper style tag sanitization
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 8.6EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
26 Nov 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
OWASP · java-html-sanitizerWant to know if your infrastructure is exposed to this?
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