The , primarily identified as CVE-2019-12744 , is a critical security vulnerability that allows for Remote Command Execution (RCE) . SeedDMS is an open-source document management system widely used by small and medium-sized enterprises. This vulnerability is particularly dangerous because it enables an authenticated user to gain complete control over the host server by executing arbitrary system commands. Vulnerability Mechanism: Unvalidated File Upload
In , the endpoint /op/op.AddFile.php had a fatal oversight: It did not verify the user's session before handling the file upload operation .
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Ensure that the user account running the web server (e.g., www-data ) has the minimum permissions necessary. It should never have root access to the system. Final Thoughts seeddms 5.1.22 exploit
: Ensure the web server user only has the minimum necessary permissions and that the data/ directory is not directly executable by the web server if possible.
A manual payload (time-based):
If the web server is configured to execute PHP files (default for SeedDMS), an uploaded web shell—e.g., shell.php —placed within the data/ directory or its subfolders, can be accessed directly via HTTP. The attacker then gains the privileges of the web server user (commonly www-data ). The , primarily identified as CVE-2019-12744 , is
sqlmap -u "http://target/seeddms51/op/op.RemoveDocument.php?documentid=1" \ --technique=T --dbms=mysql --level=3 --risk=2 \ -D seeddms_db -T tblUsers -C login,passwd --dump
Once the attacker obtains admin credentials (hash cracked via John or Hashcat), they gain full access to the DMS.
The attacker gains an initial foothold, allowing them to run system commands, read sensitive configuration files, or pivot deeper into the local network. Technical Breakdown of the Exploit Chain Vulnerability Mechanism: Unvalidated File Upload In , the
The CVSS v3.1 base score for SQL injection vulnerabilities typically ranges from 6.1 to 7.2, depending on the database user’s privileges and the specifics of the affected component.
If you need to secure a specific deployment, please tell me: What hosts your installation? What web server (Apache, Nginx) do you run? Do you have command-line access to move directories?
They may change the Content-Type header to application/x-php or leave it as image/jpeg while keeping the .php extension to fool basic validation logic. 4. Locating the Path and Execution
The most effective remediation is upgrading to the latest stable release of SeedDMS. The developers patched these specific input validation and access control flaws in subsequent versions. Implement Strict File Execution Policies
Implement Multi-Factor Authentication (MFA) for all user roles.