Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - Wikibase Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - Wikibase Extension: 1.45, 1.44, 1.43, 1.39.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00011.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
The Wikimedia Foundation Mediawiki - Wikibase Extension unaffected
Version Status Constraints
1.45 affected —
1.44 affected —
1.43 affected —
1.39 affected —

Configuration 1 [-]

OR cpe:2.3:a:wikimedia:wikibase:1.39:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:wikibase:1.43:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:wikibase:1.44:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:wikibase:1.45:*:*:*:*:mediawiki:*:*

No data.

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Vendors Products
Mediawiki Subscribe
Mediawiki Subscribe
Wikimedia Subscribe
Mediawiki-wikibase Extension Subscribe

Project Subscriptions

Vendors Products
Mediawiki Subscribe
Mediawiki Subscribe
Wikimedia Subscribe
Mediawiki-wikibase Extension Subscribe
Wikibase Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gerrit.wikimedia.org/r/q/I39d0074b2ad022b6efe6ab3dd8c8ec0f86c6c466 cve-icon cve-icon
https://phabricator.wikimedia.org/T409737 cve-icon cve-icon cve-icon
History

Thu, 12 Feb 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Wikimedia wikibase
CPEs cpe:2.3:a:wikimedia:wikibase:1.39:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:wikibase:1.43:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:wikibase:1.44:*:*:*:*:mediawiki:*:*
cpe:2.3:a:wikimedia:wikibase:1.45:*:*:*:*:mediawiki:*:*
Vendors & Products Wikimedia wikibase
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

Fri, 09 Jan 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 09 Jan 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Mediawiki
Mediawiki mediawiki
Wikimedia
Wikimedia mediawiki-wikibase Extension
Vendors & Products Mediawiki
Mediawiki mediawiki
Wikimedia
Wikimedia mediawiki-wikibase Extension

Fri, 09 Jan 2026 00:00:00 +0000

Type Values Removed Values Added
Description Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - Wikibase Extension allows Cross-Site Scripting (XSS).This issue affects Mediawiki - Wikibase Extension: 1.45, 1.44, 1.43, 1.39.
Title Stored XSS through autocomment system messages in Wikibase
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-01-09T19:16:54.193Z

Reserved: 2026-01-08T23:23:42.385Z

Link: CVE-2026-22710

cve-icon Vulnrichment

Updated: 2026-01-09T19:16:51.483Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-09T00:15:45.693

Modified: 2026-02-12T17:50:39.720

Link: CVE-2026-22710

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-01-09T13:24:06Z

Weaknesses