CVE-2017-8812: Debian Linux

Medium severity, CVSS 5.3. EPSS: 1.6% chance of exploitation in the next 30 days.

MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows remote attackers to inject > (greater than) characters via the id attribute of a headline.

Affected products

• Debian Debian Linux: version 9.0 only
• Mediawiki Mediawiki: up to and including 1.27.3; version 1.28.0 only; version 1.28.1 only; version 1.28.2 only; version 1.29.0 only; version 1.29.1 only

Published 2017-11-15. Last modified 2026-06-17.