What’s Vulnerable › Vulnerabilities

CVE-2016-6337

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-04-20 · updated 2026-06-17
• Weakness: CWE-284

Description

MediaWiki 1.27.x before 1.27.1 might allow remote attackers to bypass intended session access restrictions by leveraging a call to the UserGetRights function after Session::getAllowedUserRights.

Affected products

• Wikimedia Foundation MediaWiki: 1.27.0

References

• https://lists.wikimedia.org/pipermail/mediawiki-announce/2016-August/000195.html
• https://phabricator.wikimedia.org/T139670
• https://lists.wikimedia.org/pipermail/mediawiki-announce/2016-August/000195.html
• https://phabricator.wikimedia.org/T139670

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