CVE-2025-11261
published 2026-02-03CVE-2025-11261: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability…
PriorityP424medium6.1CVSS 3.1
AVNACLPRNUIRSCCLILAN
EPSS
0.22%
13.4th percentile
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.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | mediawiki | < mediawiki 1:1.39.17-1~deb12u1 (bookworm) | mediawiki 1:1.39.17-1~deb12u1 (bookworm) |
| mediawiki | mediawiki | < 1.39.15 | 1.39.15 |
| mediawiki | mediawiki | >= 0 < 1:1.35.13-1+deb11u5 | 1:1.35.13-1+deb11u5 |
| mediawiki | mediawiki | >= 0 < 1:1.39.17-1~deb12u1 | 1:1.39.17-1~deb12u1 |
| mediawiki | mediawiki | >= 0 < 1:1.43.6+dfsg-1~deb13u1 | 1:1.43.6+dfsg-1~deb13u1 |
| mediawiki | mediawiki | >= 0 < 1:1.43.5+dfsg-1 | 1:1.43.5+dfsg-1 |
| mediawiki | mediawiki | >= 1.43.0 < 1.43.5 | 1.43.5 |
| mediawiki | mediawiki | >= 1.44.0 < 1.44.2 | 1.44.2 |
| wikimedia_foundation | mediawiki | >= * < 1.39.15, 1.43.5, 1.44.2 | 1.39.15, 1.43.5, 1.44.2 |
CVSS provenance
nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
nvdv4.00.0NONECVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/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
vendor_redhat4.6NONE
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Red Hat
MediaWiki: MediaWiki: Cross-site Scripting (XSS) vulnerability
vendor_redhat·2026-02-03·CVSS 4.6
CVE-2025-11261 [NONE] CWE-79 MediaWiki: MediaWiki: Cross-site Scripting (XSS) vulnerability
MediaWiki: MediaWiki: Cross-site Scripting (XSS) vulnerability
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.
A flaw was found in MediaWiki. This vulnerability, known as Cross-site Scripting (XSS), occurs due to improper neutralization of input during web page generation. A remote attacker could exploit this by injecting malicious scripts into web pages. Successful exploitation could lead to arbitrary code execution in the user's browser, information disclosure, or session hijacking.
Statement: This stored cross-site scr
Debian
CVE-2025-11261: mediawiki - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site ...
vendor_debian·2025
CVE-2025-11261 [NONE] CVE-2025-11261: mediawiki - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site ...
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.
Scope: local
bookworm: resolved (fixed in 1:1.39.17-1~deb12u1)
bullseye: resolved (fixed in 1:1.35.13-1+deb11u5)
forky: resolved (fixed in 1:1.43.5+dfsg-1)
sid: resolved (fixed in 1:1.43.5+dfsg-1)
trixie: resolved (fixed in 1:1.43.6+dfsg-1~deb13u1)
OSV
CVE-2025-11261: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki
osv·2026-02-03
CVE-2025-11261 [NONE] CVE-2025-11261: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki
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.
GHSA
GHSA-jrq3-c447-h584: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki
ghsa_unreviewed·2026-02-03
CVE-2025-11261 [LOW] CWE-79 GHSA-jrq3-c447-h584: Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2025-11261 mediawiki: MediaWiki: Cross-site Scripting (XSS) vulnerability [fedora-42]
bugzilla·2026-02-03
CVE-2025-11261 [NONE] CVE-2025-11261 mediawiki: MediaWiki: Cross-site Scripting (XSS) vulnerability [fedora-42]
CVE-2025-11261 mediawiki: MediaWiki: Cross-site Scripting (XSS) vulnerability [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, change
Wiz
CVE-2025-11261 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.1
CVE-2025-11261 [MEDIUM] CVE-2025-11261 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2025-11261 :
NixOS vulnerability analysis and mitigation
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.
Source : NVD
Published February 3, 2026
Severity NONE
CNA Score N/A
Affected Technologies
NixOS
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 0.3
Exploitation Probability (EPSS) N/A
Affected packages and libraries
mediawiki
Sources
NVD
Debian 11, 12, 13, 14 Severity MEDIUM Has Fix Added at: N
2026-02-03
Published