CVE-2026-53987: Tag Plugin GLPI 11

Medium severity, CVSS 6.4. EPSS: 0.5% chance of exploitation in the next 30 days.

The Tag plugin for GLPI 11 before 2.14.4 stores the tag name without HTML sanitization and renders it into the Kanban badge markup via PluginTagTag::preKanbanContent() without output escaping, resulting in stored cross-site scripting. An authenticated user with TAG MANAGEMENT create or update rights can set a tag name containing HTML, which then executes in the browser of any user who opens the Kanban view of a ticket, problem, change, or project the tag is attached to.

Affected products

• Tag Plugin GLPI 11: from 2.6.0, before 2.14.4 (fixed in 2.14.4)

Published 2026-07-09. Last modified 2026-07-20.