CVE-2026-48943: Joomlaworks k2

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

K2 ≤ 2.24 contains a mass-assignment defect in the K2 system user plugin `plg_user_k2`. A Registered Joomla user, by including the field `K2UserForm=1` in a standard `com_users` `profile.save` POST, can write arbitrary values into the `notes`, `image`, and `plugins` columns of their own row in the `#__k2_users` table — none of which are exposed by the K2 frontend profile-edit form.

Affected products

• Joomlaworks k2: up to and including 2.26

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