An issue was discovered in DifferenceEngine.php in MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. diff-multi-sameuser (aka X intermediate revisions by the same user not shown) ignores username suppression. This is an information leak.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mediawiki | Mediawiki | * | 1.35.12 (excluding) |
| Mediawiki | Mediawiki | 1.36.0 (including) | 1.39.5 (excluding) |
| Mediawiki | Mediawiki | 1.40.0 (including) | 1.40.0 (including) |
| Mediawiki | Mediawiki | 1.40.0-rc0 (including) | 1.40.0-rc0 (including) |
| Mediawiki | Ubuntu | bionic | * |
| Mediawiki | Ubuntu | lunar | * |
| Mediawiki | Ubuntu | mantic | * |
| Mediawiki | Ubuntu | trusty | * |
| Mediawiki | Ubuntu | upstream | * |
| Mediawiki | Ubuntu | xenial | * |