Restrict the "Add document" permission to trusted users only.
SeedDMS is an open-source document management system that, in version 5.1.22 and earlier, contains critical security flaws allowing attackers to gain full control of the underlying server. 1. Reconnaissance and Enumeration
Securing your Document Management System requires a defense-in-depth framework to systematically remediate these application design failures. Immediate Software Patches seeddms 5.1.22 exploit
While RCE is the "crown jewel" for attackers, version 5.1.22 has also been linked to:
An attacker with authenticated access (even with lower-tier permissions) uploads a document containing malicious PHP code. If the application does not validate the file extension against a strict allowlist—or fails to sanitize input fields handled by underlying script components—the file is written to a web-accessible directory. Restrict the "Add document" permission to trusted users only
: Navigate to the directory where SeedDMS stores uploaded files (typically under /data/1048576/ ) and call the uploaded PHP file with a command parameter. : The server executes the command (e.g., cat /etc/passwd ) and returns the output to the browser. Security Risks and Statistics
: Authenticated (requires valid user credentials, though lower-privileged roles are often sufficient). : Navigate to the directory where SeedDMS stores
Unrestricted File Upload leading to Remote Code Execution (RCE).