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CVE-2025-4855— Support Board <= 3.8.0 - Unauthenticated Authorization Bypass due to Use of Default Secret Key

Quick assessment

Affected
Schiocco Support Board
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。WordPress plugin是一个应用插件。 WordPress plugin Support Board 3.8.0及之前版本存在安全漏洞，该漏洞源于使用硬编码默认密钥，可能导致未经授权的数据访问或修改。

CVSS 9.8 · Critical EPSS 0.34% · P26

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-4855

Vulnerability Information
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Vulnerability Title
Support Board <= 3.8.0 - Unauthenticated Authorization Bypass due to Use of Default Secret Key
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Support Board 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。WordPress plugin是一个应用插件。 WordPress plugin Support Board 3.8.0及之前版本存在安全漏洞，该漏洞源于使用硬编码默认密钥，可能导致未经授权的数据访问或修改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Schiocco Support Board * ~ 3.8.0 -

II. Public POCs for CVE-2025-4855

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III. Intelligence Information for CVE-2025-4855

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IV. Related Vulnerabilities

Same product: Support Board
Same vendor: Schiocco
Same weakness: CWE-639

V. Comments for CVE-2025-4855

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