CVE-2026-78276 WordPress Fluent Boards Pro plugin <= 2.0.11 - PHP Object Injection vulnerability
An attacker can exploit PHP object injection in the Fluent Boards Pro plugin to potentially execute arbitrary code on the WordPress site.
- 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-2026-78276?
CVE-2026-78276 is a high-severity unsafe deserialization vulnerability in WP Manage Ninja Fluent Boards Pro, published on 27 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Editor PHP Object Injection in Fluent Boards Pro <= 2.0.11 versions.
Weakness: CWE-502
Which versions are affected by CVE-2026-78276?
How do I fix CVE-2026-78276?
No fix has been published for CVE-2026-78276 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-2026-78276 being exploited?
There is no known exploitation of CVE-2026-78276 in the wild and no public exploit code.
Sources
Also known as GHSA-8fp2-8xxx-p64x.