What’s Vulnerable › Vulnerabilities

CVE-2025-29771: HtmlSanitizer vulnerable to XSS when used with contentEditable

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-03-14 · updated 2026-06-17
• Weakness: CWE-79

Description

HtmlSanitizer is a client-side HTML Sanitizer. Versions prior to 2.0.3 have a cross-site scripting vulnerability when the sanitizer is used with a `contentEditable` element to set the elements `innerHTML` to a sanitized string produced by the package. If the code is particularly crafted to abuse the code beautifier, that runs AFTER sanitation. The issue is patched in version 2.0.3.

Affected products

• jitbit HtmlSanitizer: before 2.0.3

References

• https://github.com/jitbit/HtmlSanitizer/commit/af6d2a78877e7277cd01c825b7fb50edb5956963
• https://github.com/jitbit/HtmlSanitizer/security/advisories/GHSA-vhv4-fh94-jm5x

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