What the vulnerability does
01Description
The Post Grid, Slider & Carousel Ultimate – with Shortcode, Gutenberg Block & Elementor Widget plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.6.7 via deserialization of untrusted input in the outpost_shortcode_metabox_markup function. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. 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
A flaw in Post Grid, Slider & Carousel Ultimate allows authenticated users with low privileges to deserialize untrusted data, leading to remote code execution on the site. An attacker with a user account can craft malicious serialized PHP objects that execute arbitrary code when processed by the plugin. This affects all versions up to 1.6.7.
What an attacker can do
03Attacker Capabilities
Run their own PHP code on the site and take full control of it.
Potential impact on your site
04Site Impact
Any user account on your site—even a basic subscriber—can compromise the entire WordPress installation.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
March 13, 2024
CVE published
April 8, 2026
Record updated
