CVE-2026-103445
Received Received - Intake

Stored XSS in MediaWiki Page Forms Extension

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: wikimedia-foundation

Description
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki Page_Forms extension allows Stored XSS. This issue affects MediaWiki Page_Forms extension: 1.46, 1.45, and 1.43.

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Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-09-30
AI Q&A
2026-09-30
EPSS Evaluated
N/A
NVD
CVE-2026-103445
EUVD
EUVD-2026-90196

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
the_wikimedia_foundation mediawiki_page_forms 1.43
the_wikimedia_foundation mediawiki_page_forms 1.45
the_wikimedia_foundation mediawiki_page_forms 1.46

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-80 The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.

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Executive Summary

CVE-2026-103445 is a stored cross-site scripting (XSS) vulnerability in the MediaWiki PageForms extension. It occurs via the #autoedit parser function's redirect parameter, which allows attackers with basic page-edit rights to inject malicious javascript: URLs into HTML links. When users click these links, the embedded JavaScript executes within the wiki's domain, potentially enabling attackers to perform actions as the victim.

Impact Analysis

This vulnerability could allow attackers to execute malicious scripts in your browser when you interact with affected wiki pages. This might lead to unauthorized actions on your behalf, data theft, or session hijacking. The impact depends on your permissions and the wiki's configuration.

Mitigation Strategies

Update the MediaWiki PageForms extension to the patched versions (1.46, 1.45, or 1.43 with fixes applied). Apply the patch for the `#autoedit` parser function to sanitize the redirect parameter and prevent javascript: URL injection.

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