An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. When a user with checkuserlog permissions makes many CheckUserLog API requests in some configurations, denial of service can occur (RequestTimeoutException or upstream request timeout).
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mediawiki | Mediawiki | * | 1.39.3 (including) |