CVE-2026-12904 Missing authorization in Kadence Blocks — Page Builder Toolkit for Gutenberg Editor
Authenticated contributors can read or delete other users' optimizer data by mismatching post IDs and paths in Kadence Blocks.
- 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-2026-12904?
CVE-2026-12904 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 – Gutenberg Blocks for Page Builder Features plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to and including 3.7.7. This is due to a mismatch between the object used for authorization and the object actually accessed in the Optimize_Rest_Controller's create_item(), get_item(), delete_item(), and bulk_delete_items() endpoints — authorization is checked via current_user_can('edit_post'/'delete_post', $post_id) against the user-supplied post_id, while the storage layer keys analysis records on sha256($post_path) from a separately supplied, attacker-controlled post_path parameter, with no enforcement that post_path corresponds to post_id. This makes it possible for authenticated attackers, with Contributor-level access and above, to read or delete optimizer analysis records belonging to posts owned by other users by submitting their own post_id (which passes the capability check) together with the victim post's path.
Weakness: CWE-639
Which versions are affected by CVE-2026-12904?
How do I fix CVE-2026-12904?
No fix has been published for CVE-2026-12904 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-2026-12904 being exploited?
There is no known exploitation of CVE-2026-12904 in the wild and no public exploit code.
Sources
Also known as GHSA-pjfr-44xr-rrw5.