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Related Vulnerabilities: CVE-2021-35197

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).

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Description

The MITRE CVE dictionary describes this issue as:

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).

Additional Information

Bugzilla 1980308: CVE-2021-35197 mediawiki: blocked users are able to purge pages impacting Integrity
CWE-306: Missing Authentication for Critical Function
FAQ: Frequently asked questions about CVE-2021-35197

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CVE-2021-35197

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