Mediawiki · Mediawiki Checkuser Extension · CVE-2023-37303
**Name of the Vulnerable Software and Affected Versions**
CheckUser extension for MediaWiki versions through 1.39.3
**Description**
An issue was discovered in certain situations where an attempt to block a user fails after a temporary browser hang and a DBQueryDisconnectedError error message.
**Recommendations**
For CheckUser extension for MediaWiki versions through 1.39.3, update to a version later than 1.39.3 to resolve the issue.
At the moment, there is no information about other specific mitigation measures for this issue.