CVE-2025-65238
📋 TL;DR
This vulnerability allows attackers with low-level privileges in OpenCode Systems USSD Gateway to bypass access controls and dump user records containing sensitive information. It affects organizations using the vulnerable version of the USSD Gateway software for mobile communication services.
💻 Affected Systems
- OpenCode Systems USSD Gateway
📦 What is this software?
Ussd Gateway by Opencode
⚠️ Risk & Real-World Impact
Worst Case
Attackers could exfiltrate all user records including personal identifiable information, authentication credentials, and sensitive communication data, leading to data breaches, identity theft, and regulatory violations.
Likely Case
Low-privilege users or compromised accounts could access and steal sensitive user information from the system, potentially exposing customer data and violating privacy regulations.
If Mitigated
With proper access controls and monitoring, unauthorized access attempts would be blocked and logged, limiting exposure to attempted intrusions only.
🎯 Exploit Status
Exploitation requires authenticated access but with low privileges. Public technical details available in referenced blog posts.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Monitor OpenCode Systems for security updates and apply when released.
🔧 Temporary Workarounds
Implement strict access controls
allAdd additional authorization checks to the getSubUsersByProvider function to verify user permissions before allowing access to sensitive data.
Network segmentation
allRestrict network access to the USSD Gateway to only trusted internal networks and implement firewall rules to limit exposure.
🧯 If You Can't Patch
- Implement application-level monitoring and alerting for unauthorized access attempts to the getSubUsersByProvider function
- Apply principle of least privilege to all user accounts and regularly audit access permissions
🔍 How to Verify
Check if Vulnerable:
Check if running OpenCode USSD Gateway version 6.13.11. Test if low-privilege users can access the getSubUsersByProvider function and retrieve user records they shouldn't have access to.Check Version:
Check application configuration files or administrative interface for version informationVerify Fix Applied:
After implementing workarounds, test with low-privilege accounts to ensure they cannot access sensitive user data through the vulnerable function.📡 Detection & Monitoring
Log Indicators:
- Multiple unauthorized access attempts to getSubUsersByProvider function
- Unusual data retrieval patterns from user databases
- Access logs showing low-privilege users accessing sensitive endpoints
Network Indicators:
- Unusual outbound data transfers from USSD Gateway servers
- Suspicious API calls to user data endpoints
SIEM Query:
source="ussd_gateway" AND (event="getSubUsersByProvider" OR endpoint="/api/users") AND user_role="low_privilege" AND result="success"