The ScratchLogin extension through 1.1 for MediaWiki does not escape verification failure messages, which allows users with administrator privileges to perform cross-site scripting (XSS).
https://github.com/InternationalScratchWiki/mediawiki-scratch-login/pull/22
https://github.com/InternationalScratchWiki/mediawiki-scratch-login/blob/4d2c1229b558b9cd685961274f20b621d114f4db/ScratchLogin.common.php#L104
Source: Mitre, NVD
Published: 2022-11-17
Updated: 2026-06-17
Base Score: 4.7
Vector: CVSS2#AV:N/AC:L/Au:M/C:P/I:P/A:N
Severity: Medium
Base Score: 4.8
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
EPSS: 0.00154