CVE-2025-34113: Tiki Software Community Association Wiki CMS Groupware

High severity, CVSS 8.7. EPSS: 3% chance of exploitation in the next 30 days.

An authenticated command injection vulnerability exists in Tiki Wiki CMS versions ≤14.1, ≤12.4 LTS, ≤9.10 LTS, and ≤6.14 via the `viewmode` GET parameter in `tiki-calendar.php`. When the calendar module is enabled and an authenticated user has permission to access it, an attacker can inject and execute arbitrary PHP code. Successful exploitation leads to remote code execution in the context of the web server user.

Affected products

• Tiki Software Community Association Wiki CMS Groupware: up to and including 14.1; up to and including 12.4 LTS; up to and including 9.10 LTS; up to and including 6.14

Published 2025-07-15. Last modified 2026-06-17.