Auth bypass in MediaWiki

CVE-2011-1766

includes/User.php in MediaWiki before 1.16.5, when wgBlockDisablesLogin is enabled, does not clear certain cached data after verification of an auth token fails, which allows remote attackers to bypass authentication by creating crafted wikiUserID and wikiUserName cookies, or by leveraging an unattended workstation.

Vulnerability class: Broken Authentication

EPSS: 0.022 (80.9th percentile) — read the EPSS interpretation.

Affected products

  • Mediawiki — versions 1.1.0, 1.2.0, 1.2.1
  • N/a — versions n/a

Weakness classification (CWE)

References