CVE-2026-97283 WordPress Advanced Post Manager plugin <= 4.5.5 - PHP Object Injection vulnerability
An attacker can exploit PHP object injection in the Advanced Post Manager plugin to potentially execute arbitrary code on the WordPress site.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-97283?
CVE-2026-97283 is a critical unsafe deserialization vulnerability in Liquid Web / StellarWP Advanced Post Manager, published on 5 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Deserialization of Untrusted Data vulnerability in Liquid Web / StellarWP Advanced Post Manager advanced-post-manager allows Object Injection.This issue affects Advanced Post Manager: from n/a through 4.5.5.
Weakness: CWE-502
Which versions are affected by CVE-2026-97283?
How do I fix CVE-2026-97283?
No fix has been published for CVE-2026-97283 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-2026-97283 being exploited?
There is no known exploitation of CVE-2026-97283 in the wild and no public exploit code.
Sources
Also known as GHSA-52qx-gr3f-hfqm.