RainyGao DocSys CVE-2025-11630

No vendor-released patch has been identified at the time of analysis. Immediate remediation options include: (1) Upgrade DocSys to a version newer than 2.02.36 if available from the vendor (contact RainyGao directly or check their official repository); (2) If upgrade is not possible, restrict network access to the /Doc/uploadDoc.do endpoint to trusted internal networks only, using a reverse proxy, WAF, or firewall rules to block external access; (3) Implement strict input validation on the 'path' parameter by filtering or rejecting any request containing path traversal sequences ('../', '..\', unicode encoding of these sequences); (4) Run the application with minimal file system permissions-ensure the process user cannot write outside the intended upload directory; (5) Monitor file upload activity for suspicious path patterns in logs. The trade-off of network restriction is reduced availability but significantly lower exploitation risk; input filtering may be bypassed if encoding is not comprehensive. Given the unresponsive vendor, consider evaluating alternative file management solutions.