What the vulnerability does
01Description
The Timeline Event History plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.1 via deserialization of untrusted input 'timelines-data' parameter. 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 software. 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
Timeline Event History versions 3.1 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 to trigger code execution with full site privileges. This affects all installations running the vulnerable version range.
What an attacker can do
03Attacker Capabilities
Run arbitrary code on the site with full administrative privileges.
Potential impact on your site
04Site Impact
Any authenticated user can compromise the entire site, steal data, modify content, or install backdoors.
Conditions required to exploit
05Prerequisites
Attacker must have a low-level user account (subscriber or above) on the site.
Key dates
06Disclosure timeline
July 18, 2024
CVE published
April 8, 2026
Record updated
