CVE-2025-66073 HIGH

CVE-2025-66073: WordPress WP Webhooks plugin <= 3.3.8 - PHP Object Injection vulnerability

Vendor Cozmoslabs
Product WP Webhooks
Weakness CWE-502 · Unsafe deserialization
Published November 21, 2025
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

7.2/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Explanation of Vulnerability in Simple Terms

02Summary

WP Webhooks versions 3.3.8 and earlier contain a deserialization vulnerability that allows high-privilege users to execute arbitrary PHP code on the site. An attacker with administrator or equivalent access can craft malicious serialized data to trigger code execution. This affects all installations of the plugin up to version 3.3.8.

What an attacker can do

03Attacker Capabilities

Run arbitrary PHP code on the site with full site privileges.

Potential impact on your site

04Site Impact

A compromised admin account can fully compromise the site, steal data, or modify content.

Conditions required to exploit

05Prerequisites

Attacker must have high-level site access (administrator role or equivalent).

Key dates

06Disclosure timeline

November 21, 2025 CVE published
April 28, 2026 Record updated