What the vulnerability does
01Description
The Lightbox slider – Responsive Lightbox Gallery plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.9.9 via deserialization of untrusted input through post meta data. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. No known 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 Lightbox Slider plugin for WordPress contains a deserialization vulnerability in versions up to 1.9.9. An authenticated attacker can send specially crafted data to the plugin, allowing them to read sensitive information or modify site data. The vulnerability requires a logged-in user account but no additional user interaction.
What an attacker can do
03Attacker Capabilities
Read sensitive data or modify site content by sending malicious serialized data to the plugin.
Potential impact on your site
04Site Impact
Authenticated users could access or alter site data without authorization; update the plugin immediately.
Conditions required to exploit
05Prerequisites
Attacker must have a valid WordPress user account with at least low-level privileges.
Key dates
06Disclosure timeline
March 29, 2024
CVE published
April 8, 2026
Record updated
