CVE-2026-103050

Stored i18n XSS in MassMessage

Published Sep 29, 2026 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS.

This issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.

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 - Massmessage Extension
Vendors & Products Wikimedia
Wikimedia mediawiki - Massmessage Extension
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'}

Type Values Removed Values Added
Description Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - MassMessage extension allows Stored XSS. This issue affects Mediawiki - MassMessage extension: before 1.46.1, 1.45.5, 1.43.10.
Title Stored i18n XSS in MassMessage
Weaknesses CWE-79
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
wikimedia-foundation
Published
Updated
Sep 30, 2026, 8:01 PM
Reserved
Sep 29, 2026, 10:29 PM
Status
Awaiting Analysis
Published
Sep 30, 2026, 12:16 AM
Modified
Sep 30, 2026, 9:17 PM