What the vulnerability does
01Description
The Button plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.1.27 via deserialization of untrusted input in the button_shortcode function. 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
Button versions up to 1.1.27 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. The vulnerability affects all confidentiality, integrity, and availability of the site. Update to version 1.1.28 or later.
What an attacker can do
03Attacker Capabilities
Run arbitrary code on the site with the privileges of the web server.
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 user account (e.g., subscriber or contributor role).
Key dates
06Disclosure timeline
March 29, 2024
CVE published
April 8, 2026
Record updated
