CVE-2026-103047

Received Received - Intake

Stored XSS in MediaWiki CentralAuth Extension

Publication date: 2026-09-29

Last updated on: 2026-09-29

Assigner: wikimedia-foundation

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-29

Last Modified

2026-09-29

Generated

2026-09-30

AI Q&A

2026-09-30

EPSS Evaluated

N/A

NVD

CVE-2026-103047

EUVD

EUVD-2026-89486

Affected Vendors & Products

Vendor	Product	Version / Range
the_wikimedia_foundation	mediawiki_centralauth_extension	to 1.46.1\|end_including=1.45.5\|end_including=1.43.10 (exc)

Helpful Resources

Exploitability

CWE

KEV

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

Executive Summary

This is a stored cross-site scripting (XSS) vulnerability in the Wikimedia Foundation MediaWiki CentralAuth extension. It allows attackers to inject malicious scripts into web pages that are stored on the server and executed when other users view the page.

Impact Analysis

An attacker could steal user sessions, deface web pages, or redirect users to malicious sites. Users with administrative privileges are at higher risk as the injected scripts could perform actions on their behalf.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR (data protection) and HIPAA (health information privacy) requirements. Organizations may face legal penalties and reputational damage if exploited.

Mitigation Strategies

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

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