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.
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
Link | Tags |
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https://phabricator.wikimedia.org/T328643 | patch issue tracking |