What the vulnerability does
01Description
The Bears Backup plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 2.0.0. This is due to the bbackup_ajax_handle() function not having a capability check, nor validating user supplied input passed directly to call_user_func(). This makes it possible for unauthenticated attackers to execute code on the server which can be leverage to inject backdoors or create new administrative user accounts to name a few things. On WordPress sites running the Alone theme versions 7.8.4 and older, this can be chained with CVE-2025-5394 to install the Bears Backup plugin and achieve the same impact.
Explanation of Vulnerability in Simple Terms
02Summary
Bears Backup versions 2.0.0 and earlier contain a code injection vulnerability that allows unauthenticated attackers to run arbitrary PHP code on the site over the network. No user interaction is required. An attacker can gain full control of the site, including reading sensitive data, modifying content, and disrupting service.
What an attacker can do
03Attacker Capabilities
Run arbitrary PHP code on the site and take full control without authentication.
Potential impact on your site
04Site Impact
Complete site compromise: attackers can steal data, modify content, install malware, or take the site offline.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
July 17, 2025
CVE published
April 8, 2026
Record updated
