CVE-2025-61638

Name: CVE-2025-61638
Creator: NVD / NIST
Published: 2026-02-03T00:16:09.617+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

NONECVSS 0/10EPSS 0.23%

Last modified Jun 17, 2026

CVE-2025-61638 is a none-severity vulnerability. Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki, Wikimedia Foundation Parsoid. This vulnerability is associated with program files includes/parser/Sanitizer.Php, src/Core/Sanitizer.Php. This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki, Wikimedia Foundation Parsoid. This vulnerability is associated with program files includes/parser/Sanitizer.Php, src/Core/Sanitizer.Php. This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1; Parsoid: from * before 0.16.6, 0.20.4, 0.21.1.

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

0/10

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.23%

14.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mediawiki	Mediawiki	< 1.39.14
Mediawiki	Mediawiki	>= 1.39.15, < 1.43.4
Mediawiki	Mediawiki	>= 1.43.5, < 1.44.1
Wikimedia	Parsoid	< 0.16.6
Wikimedia	Parsoid	> 0.16.6, < 0.20.4
Wikimedia	Parsoid	> 0.20.4, < 0.21.1

References

https://phabricator.wikimedia.org/T401099Third Party Advisory

Timeline

Published: Feb 3, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-61638?

How severe is CVE-2025-61638?

Severity scoring for CVE-2025-61638 is pending analysis. The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.

How do I fix CVE-2025-61638?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-61638?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST