What the vulnerability does
01Description
The LearnPress – Backup & Migration Tool plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.1.4 via deserialization of untrusted input . This makes it possible for authenticated attackers, with administrator-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Explanation of Vulnerability in Simple Terms
02Summary
LearnPress – Backup & Migration Tool versions up to 4.1.4 contain a deserialization vulnerability in backup/restore functionality. An authenticated administrator can craft a malicious backup file that executes arbitrary PHP code when imported. This requires high-level access and careful file preparation, but allows complete site compromise including data theft and modification.
What an attacker can do
03Attacker Capabilities
Run arbitrary PHP code on the site by uploading a malicious backup file.
Potential impact on your site
04Site Impact
A compromised admin account can fully compromise the site, steal data, modify content, or install backdoors.
Conditions required to exploit
05Prerequisites
Administrator account access and ability to upload/import a backup file.
Key dates
06Disclosure timeline
June 6, 2026
CVE published
June 6, 2026
Record updated
