CVE-2026-7654
HighCVSS 8.8Summary
The Admin Columns plugin for WordPress is vulnerable to PHP Object Injection leading to Remote Code Execution in versions up to and including 7.0.18. This is due to the use of `unserialize()` without an `allowed_classes` restriction, allowing attackers to inject a serialized PHP object.
Risk Assessment
Authenticated attackers with Contributor-level access and above can exploit this vulnerability to execute arbitrary code on the server, posing a significant security risk to the organization.
Recommendation
It is recommended to update the Admin Columns plugin to the latest version to mitigate this vulnerability and implement additional security measures, such as restricting access to the plugin.
Original NVD description (English source)
The Admin Columns plugin for WordPress is vulnerable to PHP Object Injection leading to Remote Code Execution in versions up to and including 7.0.18. This is due to the use of `unserialize()` without an `allowed_classes` restriction in the `IdsToCollection::get_ids_from_string()` function, which processes attacker-controlled post meta values without proper validation. This makes it possible for authenticated attackers with Contributor-level access and above to inject a serialized PHP object into a post's custom meta field and trigger arbitrary code execution by exploiting a bundled POP gadget chain, resulting in remote code execution as the web server user.