How severe is CVE-2025-29771?

CVE-2025-29771 has a CVSS 4.0 base score of 5.3, rated medium severity.

Is CVE-2025-29771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-29771?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-29771 have an EU (EUVD) identifier?

Yes. CVE-2025-29771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7889.

When was CVE-2025-29771 published?

CVE-2025-29771 was published on 2025-03-14 and last updated on 2026-06-17.

CVE-2025-29771

CVE-2025-29771 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 4.0 base score 5.3)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-7889
Weakness: CWE-79
Published: 2025-03-14
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-29771?: 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.
How severe is CVE-2025-29771?: CVE-2025-29771 has a CVSS 4.0 base score of 5.3, rated medium severity.
Is CVE-2025-29771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-29771?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-29771 have an EU (EUVD) identifier?: Yes. CVE-2025-29771 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-7889.
When was CVE-2025-29771 published?: CVE-2025-29771 was published on 2025-03-14 and last updated on 2026-06-17.

References

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

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