What the vulnerability does
01Description
The WP Simple Galleries plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 1.34 via deserialization of untrusted input from the 'wpsimplegallery_gallery' post meta via 'wpsgallery' shortcode. This allows authenticated attackers, with contributor-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
WP Simple Galleries versions 1.34 and earlier contain a deserialization vulnerability that allows authenticated users to execute arbitrary code on the site. An attacker with low-level access can craft malicious serialized data that, when processed by the plugin, runs their own PHP code with full site privileges. This affects confidentiality, integrity, and availability of the WordPress installation.
What an attacker can do
03Attacker Capabilities
Run arbitrary PHP code on the site with full WordPress privileges.
Potential impact on your site
04Site Impact
Compromised site with potential data theft, malware injection, or complete takeover.
Conditions required to exploit
05Prerequisites
Attacker must have a low-level WordPress user account (subscriber or higher).
Key dates
06Disclosure timeline
October 30, 2023
CVE published
April 8, 2026
Record updated
