CVE-2025-4339: Codexthemes Thegem

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

The TheGem theme for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the ajaxApi() function in all versions up to, and including, 5.10.3. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update arbitrary theme options.

Affected products

• Codexthemes Thegem: up to and including 5.10.3

Published 2025-05-13. Last modified 2026-06-17.