Support Board <= 3.8.0 - Unauthenticated Authorization Bypass due to Use of Default Secret Key

Authorization Bypass Through User-Controlled Key
CVE CVE-2025-4855
CVSS Critical (9.8)
Publicly Published July 8, 2025
Last Updated July 8, 2025
Researcher Foxyyy
Description

The Support Board plugin for WordPress is vulnerable to unauthorized access/modification/deletion of data due to use of hardcoded default secrets in the sb_encryption() function in all versions up to, and including, 3.8.0. This makes it possible for unauthenticated attackers to bypass authorization and execute arbitrary AJAX actions defined in the sb_ajax_execute() function. An attacker can use this vulnerability to exploit CVE-2025-4828 and various other functions unauthenticated.

References

1 affected software package

Software Type Plugin
Software Slug supportboard (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 3.8.0
Patched Version
  • 3.8.1
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