CVE-2026-48946: Joomlaworks k2

Medium severity, CVSS 6.3. EPSS: 0.3% chance of exploitation in the next 30 days.

The K2 frontend article-attachment upload path accepts files whose extension is `.php`, and Apache's standard mod_php matches `\.php$` and executes them under the K2 web user. A K2 Author can upload a `shell.php`, then fetch `/media/k2/attachments/shell.php` and execute arbitrary PHP code in the web server's context.

Affected products

• Joomlaworks k2: up to and including 2.26

Published 2026-06-25. Last modified 2026-06-28.