CVE-2026-66620 WordPress OptionTree plugin <= 2.7.3 - PHP Object Injection vulnerability
An attacker can exploit PHP object injection in the OptionTree 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-2026-66620?
CVE-2026-66620 is a high-severity unsafe deserialization vulnerability in Derek Herman OptionTree, published on 18 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Editor PHP Object Injection in OptionTree <= 2.7.3 versions.
Weakness: CWE-502
Which versions are affected by CVE-2026-66620?
How do I fix CVE-2026-66620?
No fix has been published for CVE-2026-66620 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-2026-66620 being exploited?
There is no known exploitation of CVE-2026-66620 in the wild and no public exploit code.
Sources
Also known as GHSA-rcj8-2wj2-6g63.