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.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2021-31553US | medium6.5 | — | ||
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… | ||||
02
references
External citations — patches, advisories, analysis.
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963WEB
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964WEB
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667023WEB
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667024WEB
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667025WEB
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667027WEB
- https://nvd.nist.gov/vuln/detail/CVE-2021-31553WEB
- https://phabricator.wikimedia.org/T275669WEB
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