CVE-2025-4855 Support Board <= 3.8.0 - Unauthenticated Authorization Bypass due to Use of Default Secret Key
Unauthenticated attackers can bypass authorization using hardcoded default secrets to execute arbitrary AJAX actions and modify data in the Support Board plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-4855?
CVE-2025-4855 is a critical vulnerability in Schiocco Support Board, published on 8 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-639
Which versions are affected by CVE-2025-4855?
It affects 1 product.
Products include Schiocco Support Board.
How do I fix CVE-2025-4855?
No fix has been published for CVE-2025-4855 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-4855 being exploited?
There is no known exploitation of CVE-2025-4855 in the wild and no public exploit code.
Other vulnerabilities in Schiocco Support Board
- CVE-2025-4828 Support Board <= 3.8.0 - Unauthenticated Arbitrary File Deletion
- CVE-2026-4815 SQL Injection vulnerability in Support Board
- CVE-2021-24823 Support Board < 3.3.6 - Arbitrary File Deletion via CSRF
- CVE-2021-24807 Support Board < 3.3.5 - Agent+ Stored Cross-Site Scripting
- CVE-2026-4816 Reflected Cross Site Scripting (XSS) vulnerability in Support Board
Sources
Also known as GHSA-vv4w-9vmx-jmwp.