CVE-2026-28138 WordPress uListing plugin <= 2.2.0 - PHP Object Injection vulnerability
An attacker can exploit PHP object injection in the uListing WordPress plugin to potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-28138?
CVE-2026-28138 is a high-severity unsafe deserialization vulnerability in Stylemix uListing, published on 26 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Deserialization of Untrusted Data vulnerability in Stylemix uListing ulisting allows Object Injection.This issue affects uListing: from n/a through <= 2.2.0.
Weakness: CWE-502
Which versions are affected by CVE-2026-28138?
How do I fix CVE-2026-28138?
No fix has been published for CVE-2026-28138 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-2026-28138 being exploited?
There is no known exploitation of CVE-2026-28138 in the wild and no public exploit code.
Sources
Also known as GHSA-9284-m2hp-cfp4.