CVE-2026-7654 Deserialization in Admin Columns
Authenticated contributors can achieve remote code execution via PHP object injection in the Admin Columns WordPress plugin.
- 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-2026-7654?
CVE-2026-7654 is a high-severity unsafe deserialization vulnerability in codepress Admin Columns, published on 5 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-502
Which versions are affected by CVE-2026-7654?
How do I fix CVE-2026-7654?
No fix has been published for CVE-2026-7654 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-7654 being exploited?
There is no known exploitation of CVE-2026-7654 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-h6x4-229g-5f43.