CVE-2025-11261 — Cross-site Scripting in Foundation Mediawiki

CWE-79 — Cross-site Scripting6 documents6 sources
Severity
0.0N/ANVD
EPSS
0.0%
top 99.66%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Wikimedia Foundation MediawikiMediawikiDebian Mediawiki
Timeline
PublishedFeb 3

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Language/mediawiki.Language.Js. This issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2.

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N

Affected Packages4 packages

▶CVEListV5wikimedia_foundation/mediawiki* — 1.39.15, 1.43.5, 1.44.2
▶debiandebian/mediawiki< mediawiki 1:1.39.17-1~deb12u1 (bookworm)
▶NVDmediawiki/mediawiki1.43.0 — 1.43.5+2
▶Debianmediawiki/mediawiki< 1:1.35.13-1+deb11u5+3

🔴Vulnerability Details

2
OSV
CVE-2025-11261: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki↗2026-02-03
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GHSA
GHSA-jrq3-c447-h584: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki↗2026-02-03
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📋Vendor Advisories

2
Red Hat
MediaWiki: MediaWiki: Cross-site Scripting (XSS) vulnerability↗2026-02-03
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Debian
CVE-2025-11261: mediawiki - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site ...↗2025
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🕵️Threat Intelligence

1
Wiz
CVE-2025-11261 Impact, Exploitability, and Mitigation Steps | Wiz↗
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