Incorrect Authorization Affecting mediawiki package, versions <1:1.35.3-1


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
1.94% (78th percentile)

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  • Snyk IDSNYK-ECHOLATEST-MEDIAWIKI-20414313
  • published3 Oct 2026
  • disclosed2 Jul 2021

Introduced: 2 Jul 2021

CVE-2021-35197  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Echo:latest mediawiki to version 1:1.35.3-1 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.

In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to still "purge" pages through the MediaWiki Action API (which a "sitewide block" should have prevented).

CVSS Base Scores

version 3.1