Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki WikiForum extension allows Stored XSS.

This issue affects MediaWiki WikiForum extension: master.

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact Low

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

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
The Wikimedia Foundation MediaWiki WikiForum extension unaffected
Version Status Constraints
master affected —

No data.

No data.

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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/I7849ef0f9c3eff48fd63e47e5b8affc3b25bb4dd cve-icon cve-icon
https://phabricator.wikimedia.org/T414227 cve-icon cve-icon
History

Wed, 30 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Wed, 30 Sep 2026 16:45:00 +0000

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 WikiForum extension allows Stored XSS. This issue affects MediaWiki WikiForum extension: master.
Title Stored XSS through system messages in WikiForum
Weaknesses CWE-80
References
Metrics cvssV4_0

{'score': 1.1, 'vector': 'CVSS:4.0/AV:N/AC:L/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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: wikimedia-foundation

Published:

Updated: 2026-09-30T20:01:02.627Z

Reserved: 2026-09-30T15:41:01.270Z

Link: CVE-2026-103444

cve-icon Vulnrichment

Updated: 2026-09-30T18:47:06.872Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-30T17:16:43.177

Modified: 2026-09-30T17:31:44.573

Link: CVE-2026-103444

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-30T17:30:19Z

Weaknesses