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CVE-2026-103445 is a stored cross-site scripting vulnerability in the Wikimedia Foundation MediaWiki Page_Forms extension. Improper neutralization of script-related HTML tags permits malicious script content to be stored in a web page and executed in the browsers of users who view that page. Affected Page_Forms versions are 1.46, 1.45, and 1.43.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This two-file repository is a minimal proof of concept for CVE-2026-103445 affecting the MediaWiki PageForms extension. README.md documents the vulnerability, test conditions, safe local-wiki usage, and external references. poc.py is the sole executable entry point and only prints crafted wikitext; it does not make network requests, alter files, or automatically submit content. The wikitext invokes PageForms' #autoedit parser function with a redirect parameter containing a javascript: URI. In a vulnerable installation, an editor can save this markup to an editable page, causing PageForms to render a generated Trigger link with the executable URI as its href. JavaScript executes in a visitor's browser only after that visitor clicks the link. The included payload is benign and sets a document-body data attribute, but the vulnerability class enables stored XSS with attacker-controlled JavaScript.
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