The MFT vulnerabilities that caused the most damage escalated from an injection flaw to remote code execution on the appliance. Three classes recur. SQL injection, reached unauthenticated or via a bypass, is used not just to read data but to write files to the webroot or invoke database-to-OS functionality, turning a query flaw into execution. Insecure deserialization of attacker-supplied objects (common in Java and .NET MFT backends) runs code during object reconstruction. And command injection in features that shell out (archive handling, scripting, integrations) runs OS commands directly. The appliance holds every partner's files, so code execution there is both system compromise and mass data theft.
# the shape varies by product; the pattern is inject -> write/execute
# SQLi to file write (e.g. stacked query writing a web shell to the served path)
curl -sk "https://<target>/<endpoint>?id=1;<stacked-insert-writing-aspx>"
# deserialization: send a crafted serialized object to the vulnerable parameter
curl -sk -X POST https://<target>/<endpoint> --data-binary @gadget.bin -H 'Content-Type: application/octet-stream'
# command injection in a feature that invokes the OS
curl -sk -X POST https://<target>/<endpoint> -d 'field=valid; id'
Exploitation notes#
- The escalation, not the injection alone, is the goal: SQLi that writes a web shell to the served directory, a deserialization gadget chain for the backend framework, or a command-injection sink in an OS-invoking feature.
- Many of these chain from an authentication bypass (the vulnerable endpoint sits behind auth that is itself bypassable), while some are reachable unauthenticated outright.
- Code execution lands on the appliance as the service account (often high-privileged), exposing the configuration, encryption keys, and every brokered file; prioritise the stored data and keys.
- These are product- and version-specific; the known MFT exploits pages describe the real campaigns and which class each used.