GetSimple CMS 3.2.1 Authenticated RCE via Arbitrary PHP File Upload

An authenticated remote code execution vulnerability exists in GetSimpleCMS version 3.2.1. The application’s upload.php endpoint allows authenticated users to upload arbitrary files without proper validation of MIME types or extensions. By uploading a .pht file containing PHP code, an attacker can bypass blacklist-based restrictions and place executable code within the web root. A crafted request using a polyglot or disguised extension allows the attacker to execute the payload by accessing the file directly via the web server. This vulnerability exists due to the use of a blacklist for filtering file types instead of a whitelist.

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危险类型文件的不加限制上传

GetSimple CMS 安全漏洞

GetSimple CMS是GetSimple CMS开源的一个内容管理系统。 GetSimple CMS 3.2.1版本存在安全漏洞，该漏洞源于上传功能未正确验证MIME类型和扩展名，可能导致远程代码执行。

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