Seeddms 5.1.22 Exploit

This exploit allows a user with "write" permissions to execute arbitrary system commands on the server. : Unvalidated File Upload.

Seeddms is an open-source document management system. A public exploit targeting version 5.1.22 (CVE-class style) has circulated, allowing remote attackers to achieve unauthorized access by chaining an input-validation flaw with weak access controls. Below is a concise, technical overview suitable for a security blog or advisory.

Because the storage directory allows script execution, navigating to the uploaded PHP file triggers the server's PHP interpreter.

Attackers may inject malicious scripts into document metadata (like titles or descriptions). When an admin views the document, the script executes in their browser, potentially stealing session cookies.

Understanding and Mitigating the SeedDMS 5.1.22 Exploit SeedDMS is an open-source document management system used by enterprises to store, share, and track digital documents. Security vulnerabilities in such systems present severe risks, as document repositories frequently contain intellectual property, financial records, and personally identifiable information (PII). seeddms 5.1.22 exploit

After gaining admin access through credential reuse, the attacker navigates to the file upload section and uploads shell.php containing a PHP web shell:

The most common exploit for SeedDMS 5.1.22 involves bypassing file upload restrictions to execute arbitrary commands on the server.

: This script allows the attacker to execute OS-level commands, such as cat /etc/passwd , or to spawn a reverse shell for persistent access. Other Notable Vulnerabilities

"success": true, "data": "version": "5.6.39-0ubuntu0.14.04.1-log" This exploit allows a user with "write" permissions

The exploit code is publicly available, which I will not provide here. However, I can give you an overview of how it works:

Historically, the SeedDMS ecosystem has struggled with unvalidated file uploads (e.g., CVE-2019-12744 impacting versions prior to 5.1.11). In those older iterations, users with standard write permissions could upload a .php file instead of a PDF or image, locate the raw file path under the internal storage directory ( /data/1048576/... ), and execute arbitrary system commands.

: Because the application failed to validate the file extension properly, it accepted the .php file. The attacker then identifies the document's ID and accesses it directly via the URL (e.g., /data/1048576/[ID]/1.php ).

The following is a proof of concept code that demonstrates the exploit: A public exploit targeting version 5

When an administrator reviews the system logs or event history, this payload executes silently. The script extracts the admin’s session cookie and transmits it to the attacker's server, resulting in immediate . 2. File Upload Restrictions & The RCE Threat Landscape

[Unauthenticated Attacker] │ ▼ [Bypass Authentication (CVE-2019-12745)] │ ▼ [Gain Admin Session] │ ▼ [Upload Malicious PHP Shell] │ ▼ [Execute Remote Code (RCE)] Step 1: Session Hijacking and Authentication Bypass

(Cycle 1000 , 1001 , etc.)

: Potential for malicious scripts to be injected into document metadata or descriptions.

Using the "Add Document" feature within a target folder, the attacker uploads shell.php .