CVE-2025-57202
📋 TL;DR
A stored cross-site scripting vulnerability in AVTECH SECURITY Corporation's DGM1104 device allows attackers to inject malicious scripts into the username field via the PwdGrp.cgi endpoint. When other users view the affected page, their browsers execute the injected scripts, potentially compromising their sessions or devices. This affects all users of vulnerable DGM1104 devices with the vulnerable firmware.
💻 Affected Systems
- AVTECH SECURITY Corporation DGM1104
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, hijack user sessions, redirect users to malicious sites, or perform actions on behalf of authenticated users, potentially leading to full device compromise.
Likely Case
Attackers inject malicious scripts that steal session cookies or credentials when legitimate users access the affected interface, leading to unauthorized access to the device management interface.
If Mitigated
With proper input validation and output encoding, the malicious payloads would be rendered harmless as plain text rather than executable code.
🎯 Exploit Status
Exploitation requires authentication to access the PwdGrp.cgi endpoint. The GitHub repository contains proof-of-concept code demonstrating the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check AVTECH SECURITY Corporation's website for security advisories and firmware updates. If available, download and apply the latest firmware patch following vendor instructions.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side validation to reject or sanitize special characters in username fields before storage.
Output Encoding
allApply proper HTML encoding to all user-controlled data before rendering in web pages.
🧯 If You Can't Patch
- Isolate the DGM1104 device on a separate network segment with restricted access
- Implement a web application firewall (WAF) with XSS protection rules in front of the device
🔍 How to Verify
Check if Vulnerable:
Attempt to inject a simple XSS payload like <script>alert('test')</script> into the username field via the PwdGrp.cgi endpoint and check if it executes when viewing the page.Check Version:
Check the device web interface's system information page or use SSH/Telnet to run system version commands if available.Verify Fix Applied:
After applying mitigations, test the same XSS payload injection to confirm it's properly sanitized or rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual username entries containing script tags or JavaScript code in authentication logs
- Multiple failed login attempts followed by successful access to user management functions
Network Indicators:
- HTTP POST requests to PwdGrp.cgi with suspicious payloads in parameters
- Unusual outbound connections from the DGM1104 device following user interface access
SIEM Query:
source="dgm1104" AND (uri="/cgi-bin/PwdGrp.cgi" AND (param="username" CONTAINS "<script>" OR param="username" CONTAINS "javascript:"))