What is CVE-2025-66021?

CVE-2025-66021 is a medium-severity vulnerability in Owasp Java-html-sanitizer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-11-26.

How severe is CVE-2025-66021?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Owasp Java-html-sanitizer

CVE-2025-66021

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 vulner…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (12.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Owasp Java-html-sanitizer — versions = 20240325.1
Owasp Java_html_sanitizer — versions 20240325.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2025-66021?: CVE-2025-66021 is a medium-severity vulnerability in Owasp Java-html-sanitizer, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-11-26.
How severe is CVE-2025-66021?: Medium severity. CVSS v3 base score is 6.1 out of 10.