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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

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 0.00155.

Exploitation none

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
Wikimedia Foundation Mediawiki - Wikibase Extension unaffected
Version Status Constraints
* affected < 1.46.1, 1.45.5, 1.43.10

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No data.

Project Subscriptions

No data.

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/If871fa7684d42dae057c0517d4a17132cd7aefeb cve-icon cve-icon
https://phabricator.wikimedia.org/T432877 cve-icon cve-icon
History

Wed, 30 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

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

Tue, 29 Sep 2026 17:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Stored XSS on Wikibase Special:SetSiteLink via unescaped system message
Weaknesses CWE-79
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-09-30T20:43:25.148Z

Reserved: 2026-09-25T16:03:15.841Z

Link: CVE-2026-100245

cve-icon Vulnrichment

Updated: 2026-09-30T20:43:20.392Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-29T17:17:01.567

Modified: 2026-09-30T21:16:53.610

Link: CVE-2026-100245

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T23:45:09Z

Weaknesses