CVE-2025-66073 WordPress WP Webhooks plugin <= 3.3.8 - PHP Object Injection vulnerability
An attacker can exploit PHP object injection in the WP Webhooks 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-2025-66073?
CVE-2025-66073 is a high-severity unsafe deserialization vulnerability in Cozmoslabs WP Webhooks, published on 21 Nov 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Deserialization of Untrusted Data vulnerability in Cozmoslabs WP Webhooks wp-webhooks allows Object Injection.This issue affects WP Webhooks: from n/a through <= 3.3.8.
Weakness: CWE-502
Which versions are affected by CVE-2025-66073?
How do I fix CVE-2025-66073?
No fix has been published for CVE-2025-66073 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-2025-66073 being exploited?
There is no known exploitation of CVE-2025-66073 in the wild and no public exploit code.
Sources
Also known as GHSA-25fh-5c58-j8q5.