medium6.5
CVE-2021-31553
An issue was discovered in the CheckUser extension for MediaWiki through 1.35.2.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mediawiki | Mediawiki | through 1.35.2 |
Weakness classification
References
- NVD record
- CVE.org record
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667023
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667024
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667025
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667027
- https://phabricator.wikimedia.org/T275669
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666963
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/666964
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667023
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667024
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667025
- https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CheckUser/+/667027
- https://phabricator.wikimedia.org/T275669