What the vulnerability does
01Description
The JS Archive List plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 6.1.7 via the 'included' shortcode attribute. This is due to the deserialization of untrusted input supplied via the 'included' parameter of the plugin's shortcode. 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
JS Archive List versions up to 6.1.7 contain a deserialization vulnerability that allows authenticated users to execute arbitrary code on the server. The flaw exists in how the plugin processes untrusted serialized data without proper validation. An attacker with low-level access can craft malicious input to trigger code execution with full system privileges.
What an attacker can do
03Attacker Capabilities
Run arbitrary code on the server with full system access.
Potential impact on your site
04Site Impact
A compromised low-privilege account can lead to complete site takeover, data theft, or malware installation.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account; no user interaction required.
Key dates
06Disclosure timeline
March 7, 2026
CVE published
April 8, 2026
Record updated
