CVE-2020-35477: Debian Linux

Medium severity, CVSS 5.3. EPSS: 1.7% chance of exploitation in the next 30 days.

MediaWiki before 1.35.1 blocks legitimate attempts to hide log entries in some situations. If one sets MediaWiki:Mainpage to Special:MyLanguage/Main Page, visits a log entry on Special:Log, and toggles the "Change visibility of selected log entries" checkbox (or a tags checkbox) next to it, there is a redirection to the main page's action=historysubmit (instead of the desired behavior in which a revision-deletion form appears).

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 33 only
• Mediawiki Mediawiki: before 1.35.1 (fixed in 1.35.1)

Published 2020-12-18. Last modified 2026-06-17.