NuytsTech Security

CVE-2021-31553

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An issue was discovered in the CheckUser extension for MediaWiki through 1.35.2. MediaWiki usernames with trailing whitespace could be stored in the cu_log database table such that denial of service occurred for certain CheckUser extension pages and functionality. For example, the attacker could turn off Special:CheckUserLog and thus interfere with usage tracking.

Date published : 2021-04-21

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964

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