An issue was discovered in MediaWiki before 1.37.3 and 1.38.x before 1.38.1. The contributions-title, used on Special:Contributions, is used as page title without escaping. Hence, in a non-default configuration where a username contains HTML entities, it wont be escaped.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mediawiki | Mediawiki | * | 1.37.3 (excluding) |
| Mediawiki | Mediawiki | 1.38.0 (including) | 1.38.0 (including) |
| Mediawiki | Mediawiki | 1.38.0-rc0 (including) | 1.38.0-rc0 (including) |
| Mediawiki | Mediawiki | 1.38.0-rc1 (including) | 1.38.0-rc1 (including) |