Security Advisory
CVE-2020-35480
CVE vulnerability detail — eXtreme Datacenter Security Operations
Description
An issue was discovered in MediaWiki before 1.35.1. Missing users (accounts that dont 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.