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Wikimedia Foundation MediaWiki Wikibase ExtensionUnauthenticated arbitrary file deletion through Wikibase serialized entity parsing

Risk 58
Severity
7.2
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:P/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:N/AU:Y/R:I/V:C/RE:M/U:Red

Deserialization of untrusted data vulnerability in The Wikimedia Foundation MediaWiki Wikibase extension allows Leverage Executable Code in Non-Executable Files.

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

First published (updated )
CVE-2026-103441

Wikimedia Foundation MediaWiki Wikibase ExtensionStored XSS on Wikibase Special:SetSiteLink via unescaped system message

Risk 38
Severity
6.1
XSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - Wikibase Extension allows Stored XSS.

This issue affects Mediawiki - Wikibase Extension: from before 1.46.1, 1.45.5, 1.43.10.

First published (updated )
CVE-2026-100245

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