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An issue was discovered in MediaWiki before 1.35.7, 1.36.x and 1.37.x before 1.37.3, and 1.38.x before 1.38.1. XSS can occur in configurations that allow a JavaScript payload in a username. After account creation, when it sets the page title to "Welcome" followed by the username, the username is not escaped: SpecialCreateAccount::successfulAction() calls ::showSuccessPage() with a message as second parameter, and OutputPage::setPageTitle() uses text().
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jul 2, 2022 |
| Debian | — | Upgrade mediawiki | Sep 26, 2022 | Jul 2, 2022 |
| Gentoo Linux | — | Upgrade www-apps/mediawiki. | May 23, 2023 | Jul 2, 2022 |
| Mediawiki | — | Upgrade MediaWiki to the latest version | Jul 14, 2022 | Jul 2, 2022 |
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