Bears Backup <= 2.0.0 — Unauthenticated Remote Code Execution

Am I affected?

• Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Bears Backup.
• No admin access? Run a passive check of your site. It reads public files only.
• No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

1. Update to version 2.1.0, or a newer patched version
2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
3. Watch Bears Backup to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Trương Hữu Phúc (truonghuuphuc).

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.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

• Advisorywordfence.com

Timeline

1. Jul 16, 2025

   CVE published

   Severity critical, CVSS 9.8

2. Nov 13, 2026

   Record last updated