CVE-2025-65237
📋 TL;DR
This reflected cross-site scripting (XSS) vulnerability in OpenCode Systems USSD Gateway allows attackers to inject malicious JavaScript that executes in users' browsers. Attackers can steal session cookies, redirect users, or perform actions on their behalf. Organizations using OpenCode USSD Gateway OC Release 5 are affected.
💻 Affected Systems
- OpenCode Systems USSD Gateway
📦 What is this software?
Ussd Gateway by Opencode
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator credentials, gain full control of the USSD gateway, manipulate USSD transactions, or compromise user data.
Likely Case
Session hijacking, credential theft, or phishing attacks against users accessing the vulnerable interface.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Exploitation requires tricking users into clicking malicious links. Public proof-of-concept available in referenced GitBook.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not found
Restart Required: No
Instructions:
No official patch available. Implement workarounds and monitor vendor for updates.
🔧 Temporary Workarounds
Implement Web Application Firewall (WAF)
allDeploy WAF with XSS protection rules to block malicious payloads.
Add Content Security Policy (CSP)
allImplement strict CSP headers to restrict script execution sources.
Add HTTP header: Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Isolate the USSD gateway behind a reverse proxy with input sanitization
- Implement network segmentation to limit access to the vulnerable interface
🔍 How to Verify
Check if Vulnerable:
Test by injecting XSS payloads into input parameters and checking if they execute in browser.Check Version:
Check product documentation or admin interface for version information.Verify Fix Applied:
Verify that injected scripts no longer execute and input is properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual long parameter values in web logs
- Script tags or JavaScript in URL parameters
Network Indicators:
- HTTP requests with suspicious parameters containing script tags or JavaScript
SIEM Query:
source="web_logs" AND (url="*<script*" OR param="*javascript:*")