CVE-2026-103439

Various rawParams() and escaped() updates to prevent XSS in Wikibase extension

Published Sep 30, 2026 CVSS 4.0 · 0.3 Low EPSS < 1% KEV · Not listed
Description
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikbase extension allows Cross-Site Scripting (XSS).

This issue affects MediaWiki Wikbase extension: 1.46, 1.45, and 1.43.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wikimedia
Wikimedia mediawiki-wikibase Extension
Vendors & Products Wikimedia
Wikimedia mediawiki-wikibase Extension
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Wikbase extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki Wikbase extension: 1.46, 1.45, and 1.43.
Title Various rawParams() and escaped() updates to prevent XSS in Wikibase extension
Weaknesses CWE-80
References
Metrics cvssV4_0

{'score': 0.3, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
wikimedia-foundation
Published
Updated
Sep 30, 2026, 8:01 PM
Reserved
Sep 30, 2026, 3:41 PM
Status
Awaiting Analysis
Published
Sep 30, 2026, 6:18 PM
Modified
Sep 30, 2026, 9:17 PM