Always-Incorrect Control Flow Implementation Affecting mediawiki package, versions <1:1.35.1-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
1.72% (77th percentile)

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  • Snyk IDSNYK-ECHOLATEST-MEDIAWIKI-20414298
  • published3 Oct 2026
  • disclosed18 Dec 2020

Introduced: 18 Dec 2020

CVE-2020-35477  (opens in a new tab)
CWE-670  (opens in a new tab)

How to fix?

Upgrade Echo:latest mediawiki to version 1:1.35.1-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mediawiki package and not the mediawiki package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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).

CVSS Base Scores

version 3.1