An issue was discovered in MediaWiki before 1.35.1. Missing users (accounts that don't exist) and hidden users (accounts that have been explicitly hidden due to being abusive, or similar) that the viewer cannot see are handled differently, exposing sensitive information about the hidden status to unprivileged viewers. This exists on various code paths.
An issue was discovered in MediaWiki before 1.35.1. Missing users (accounts that don't exist) and hidden users (accounts that have been explicitly hidden due to being abusive, or similar) that the viewer cannot see are handled differently, exposing sensitive information about the hidden status to unprivileged viewers. This exists on various code paths.
https://phabricator.wikimedia.org/T120883 https://github.com/wikimedia/mediawiki/commit/15bed1201ea21ce477a16e9d02170244b0086fb4 https://github.com/wikimedia/mediawiki/commit/aca0e52f5ce9312a4af4f411c756497902483a48
Vulmon