An issue was discovered in the GrowthExperiments extension for MediaWiki through 1.39.3. The UserImpactHandler for GrowthExperiments inadvertently returns the timezone preference for arbitrary users, which can be used to de-anonymize users.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Mediawiki | Mediawiki | * | 1.39.3 (including) |