Description
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.
References (1)
Core 1
Core References
Issue Tracking, Patch
https://phabricator.wikimedia.org/T328643
Scores
CVSS v3
4.3
EPSS
0.0014
EPSS Percentile
34.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-200
Status
published
Products (1)
mediawiki/mediawiki
< 1.39.3
Published
Mar 31, 2023
Tracked Since
Feb 18, 2026