CVE-2025-29771

HtmlSanitizer vulnerable to XSS when used with contentEditable

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.

Category

5.3
CVSS
Severity: Medium
CVSS 4.0 •
EPSS 0.07%
Affected: jitbit HtmlSanitizer
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2025-29771?
CVE-2025-29771 has been scored as a medium severity vulnerability.
How to fix CVE-2025-29771?
To fix CVE-2025-29771, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-29771 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-29771 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-29771?
CVE-2025-29771 affects jitbit HtmlSanitizer.
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