CVE-2025-39551 WordPress FluentBoards plugin <= 1.47 - PHP Object Injection Vulnerability
An attacker can exploit PHP object injection in the FluentBoards WordPress plugin to potentially execute arbitrary code.
- 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-2025-39551?
CVE-2025-39551 is a critical unsafe deserialization vulnerability in Mahmudul Hasan Arif FluentBoards, published on 17 Apr 2025. 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 Mahmudul Hasan Arif FluentBoards fluent-boards allows Object Injection.This issue affects FluentBoards: from n/a through <= 1.47.
Weakness: CWE-502
Which versions are affected by CVE-2025-39551?
How do I fix CVE-2025-39551?
No fix has been published for CVE-2025-39551 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-2025-39551 being exploited?
There is no known exploitation of CVE-2025-39551 in the wild and no public exploit code.
Sources
Also known as GHSA-4wcc-xwq3-8v2h.