CVE-2026-103051
Awaiting Analysis Awaiting Analysis - Queue

Stored XSS in MediaWiki CentralNotice Extension

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: wikimedia-foundation

Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CentralNotice extension allows Stored XSS. This issue affects Mediawiki - CentralNotice extension: before 1.46.1, 1.45.5, 1.43.10.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-10-19
AI Q&A
2026-09-30
EPSS Evaluated
2026-10-18
NVD
CVE-2026-103051
EUVD
EUVD-2026-89504

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
the_wikimedia_foundation mediawiki_centralnotice_extension to 1.43.10 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a stored cross-site scripting (XSS) vulnerability in the Wikimedia Foundation MediaWiki CentralNotice extension. It allows attackers to inject malicious scripts into web pages that are then stored and served to users, potentially executing unintended actions in their browsers.

Detection Guidance

This vulnerability is specific to the MediaWiki CentralNotice extension versions before 1.46.1, 1.45.5, and 1.43.10. Detection involves checking the installed version of the extension. Use commands like 'composer show mediawiki/centralnotice' or inspect the extension directory for version files.

Impact Analysis

If you use the affected MediaWiki CentralNotice extension versions, attackers could steal user sessions, deface pages, or perform actions on behalf of users. This could lead to data breaches, unauthorized access, or reputational damage.

Compliance Impact

This vulnerability could violate GDPR by exposing user data through XSS attacks. For HIPAA, it may compromise protected health information if exploited in healthcare-related wikis. Organizations must patch to maintain compliance.

Mitigation Strategies

Update the Mediawiki CentralNotice extension to version 1.46.1, 1.45.5, or 1.43.10 or later to address the stored XSS vulnerability.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-103051. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart