CVE-2026-12904
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk21th percentile — higher than 21% of all known CVEs
Summary
The Kadence Blocks plugin for WordPress up to version 3.7.7 is vulnerable to Insecure Direct Object Reference (IDOR). The authorization check uses a user-supplied post_id, but the actual read/delete operations on optimizer analysis records are performed using a hash of the post_path, which can be manipulated by the attacker. This allows authenticated attackers with Contributor-level access or higher to read or delete analysis records belonging to other users' posts.
Risk Assessment
The organization risks exposure of sensitive optimization analysis data and potential deletion of such records by unauthorized users. Attackers can access confidential performance and structural information about other users' posts, leading to data confidentiality and integrity breaches.
Recommendation
Immediately update the Kadence Blocks plugin to version 3.7.8 or later, which includes a fix for this vulnerability. Until the update is applied, restrict plugin access to trusted users only.
Original NVD description (English source)
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.