CVE-2026-12902 Missing authorization in Kadence Blocks — Page Builder Toolkit for Gutenberg Editor
Authenticated contributors can bypass authorization checks to create arbitrary media attachments in the WordPress Media Library.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-12902?
CVE-2026-12902 is a medium-severity missing authorization vulnerability in stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.7.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to create arbitrary Media Library attachments by downloading remote images to the site's uploads directory via wp_upload_bits() and wp_insert_attachment(), bypassing the upload_files capability boundary.
Weakness: CWE-862
Which versions are affected by CVE-2026-12902?
How do I fix CVE-2026-12902?
No fix has been published for CVE-2026-12902 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-12902 being exploited?
There is no known exploitation of CVE-2026-12902 in the wild and no public exploit code.
Sources
Also known as GHSA-cpmr-m3wg-cf9c.