CVE-2026-109998

The Mang Board plugin for WordPress in versions up to and including 2.4.4 is vulnerable to Stored Cross-Site Scripting via the 'content' parameter due to insufficient input sanitization and output escaping. An authenticated attacker with subscriber-level access and above can inject arbitrary web scripts into pages that execute whenever a user accesses the injected page. The sanitization bypass is compounded by the ability to omit the data_type parameter in a modify request, skipping the HTMLPurifier branch entirely and leaving only mbw_htmlspecialchars2 encoding — fully reversed at render.

The Mang Board plugin for WordPress (versions up to and including 2.4.4) is vulnerable to arbitrary file upload via the mbw_file_upload function. Missing file extension validation on the image_path parameter allows unauthenticated attackers to upload executable files, enabling remote code execution.

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.

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.

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.

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.