InternationalScratchWiki/wiki-scratchsig

InternationalScratchWiki/wiki-scratchsig

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Simple MediaWiki extension for wiki talk signatures with Scratch avatars.
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CVE History

CVEPublishedCVSS v3CVSS v2
CVE-2020-15179↗
8 HIGH4.6 MEDIUM

The ScratchSig extension for MediaWiki before version 1.0.1 allows stored Cross-Site Scripting. Using <script> tag inside <scratchsig> tag, attackers with edit permission can execute scripts on visitors' browser. With MediaWiki JavaScript API, this can potentially lead to privilege escalation and/or account takeover. This has been patched in release 1.0.1. This has already been deployed to all Scratch Wikis. No workarounds exist other than disabling the extension completely.