CVE-2026-107751
HighCVSS 7.2Summary
The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'user_name' parameter in all versions up to and including 2.4.3 due to insufficient input sanitization and output escaping. The save-time sanitizer mbw_htmlspecialchars2() is ineffective because the exploit payload relies solely on unquoted HTML attribute syntax using only spaces, alphanumerics, and characters such as =, parentheses, and dots.
Risk Assessment
An unauthenticated attacker can inject arbitrary web scripts into pages that will execute whenever a user accesses an injected page, enabling session or data theft.
Recommendation
Update the Mang Board plugin to a version newer than 2.4.3. Consider disabling the plugin until updated.
Other vulnerabilities in Mang Board
See all- CVE-2026-104909High
The Mang Board plugin for WordPress is vulnerable to Local File Inclusion in all versions up to and including 2.4.3 via the '<mode>_type' parameter. This allows unauthenticated attackers to include and execute arbitrary .php files on the server, enabling access control bypass, sensitive data disclosure, or code execution. Exploitation is trivial via an unauthenticated POST to any page rendering a public [mb_board] shortcode, and on standard PHP installations pearcmd.php can be leveraged to write and include an attacker-controlled payload in a single request.
- CVE-2026-104761Medium
The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content' parameter in all versions up to, and including, 2.4.3 due to insufficient input sanitization and output escaping. This allows authenticated attackers with custom-level access and above to inject arbitrary web scripts that execute whenever a user accesses an injected page.
- CVE-2026-96871High
The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'data_type' parameter in all versions up to and including 2.4.2 due to insufficient input sanitization and output escaping. This is exploitable on any board configured with the default write_level=0 and editor_type=N settings.
Original NVD description (English source)
The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'user_name' parameter in all versions up to, and including, 2.4.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The save-time sanitizer mbw_htmlspecialchars2() is ineffective against this vector because the exploit payload relies solely on unquoted HTML attribute syntax using only spaces, alphanumerics, and characters such as =, parentheses, and dots — none of which are escaped.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS