An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. Special:CheckUserLog allows CheckUser XSS because of date mishandling, as demonstrated by an XSS payload in MediaWiki:October.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Mediawiki | — | Upgrade MediaWiki to the latest version | Jan 17, 2022 | Jan 10, 2022 |
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