CVE-2025-1646
📋 TL;DR
This critical vulnerability in Lumsoft ERP 8 allows remote attackers to upload arbitrary files via the /Api/TinyMce/UploadAjaxAPI.ashx endpoint due to insufficient input validation. Organizations using Lumsoft ERP 8 with the vulnerable ASPX File Handler component are affected, potentially leading to complete system compromise.
💻 Affected Systems
- Lumsoft ERP
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system takeover, data exfiltration, ransomware deployment, or creation of persistent backdoors.
Likely Case
Malicious file upload leading to web shell installation, data manipulation, or lateral movement within the network.
If Mitigated
File upload attempts are blocked or logged, with no successful exploitation due to proper input validation and file type restrictions.
🎯 Exploit Status
Exploit details are publicly available on GitHub, making this easily exploitable by attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - vendor did not respond to disclosure
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds.
🔧 Temporary Workarounds
Block vulnerable endpoint
allRestrict access to /Api/TinyMce/UploadAjaxAPI.ashx via web server configuration or firewall rules
IIS: Use Request Filtering to block the path
Firewall: Add rule to block traffic to */Api/TinyMce/UploadAjaxAPI.ashx
Implement file upload validation
Windows/IISAdd server-side validation to restrict file types, extensions, and content
Modify web.config to add file type restrictions
Implement custom HTTP handler validation
🧯 If You Can't Patch
- Isolate the ERP system in a separate network segment with strict access controls
- Implement web application firewall (WAF) rules to block file upload exploits and monitor for attack patterns
🔍 How to Verify
Check if Vulnerable:
Test if /Api/TinyMce/UploadAjaxAPI.ashx accepts file uploads without proper validation by attempting to upload a test fileCheck Version:
Check Lumsoft ERP version in application interface or configuration filesVerify Fix Applied:
Attempt to exploit the vulnerability after implementing workarounds - successful file uploads should be blocked📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /Api/TinyMce/UploadAjaxAPI.ashx
- ASPX or executable files being uploaded via the endpoint
- Increased error logs from the upload handler
Network Indicators:
- POST requests to /Api/TinyMce/UploadAjaxAPI.ashx with file uploads
- Unusual outbound connections from the ERP server
SIEM Query:
source="IIS" AND (url="/Api/TinyMce/UploadAjaxAPI.ashx" OR file_upload="true") AND (file_extension="aspx" OR file_extension="exe" OR file_extension="php")