What the vulnerability does
01Description
The User Registration plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 3.0.1 via deserialization of untrusted input from the 'profile-pic-url' parameter. This allows authenticated attackers, with subscriber-level permissions and above, to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.
Explanation of Vulnerability in Simple Terms
02Summary
The User Registration & Membership plugin for WordPress contains a deserialization vulnerability in versions up to 3.0.1. An authenticated attacker with low privileges can send a specially crafted request to deserialize untrusted data, leading to remote code execution. This allows the attacker to run their own PHP code on the site, potentially compromising the entire WordPress installation.
What an attacker can do
03Attacker Capabilities
Run their own code on the site and take full control of the WordPress installation.
Potential impact on your site
04Site Impact
An attacker with a basic user account can compromise your entire site, steal data, and modify content.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
July 13, 2023
CVE published
April 8, 2026
Record updated
