CVE-2025-70614: OC Messaging Gateway Auth Bypass Flaw

CVE-2025-70614 Overview

CVE-2025-70614 is a broken access control vulnerability affecting OpenCode Systems OC Messaging / USSD Gateway OC Release 6.32.2. The vulnerability exists within the web-based control panel and allows authenticated low-privileged attackers to gain unauthorized access to arbitrary SMS messages by manipulating company or tenant identifier parameters. This type of Insecure Direct Object Reference (IDOR) vulnerability enables horizontal privilege escalation, potentially exposing sensitive communications across multiple tenants in a multi-tenant environment.

Critical Impact

Authenticated attackers with low privileges can access arbitrary SMS messages belonging to other organizations or tenants by crafting malicious company or tenant identifier parameters, resulting in significant data exposure and privacy violations.

Affected Products

• OpenCode Systems OC Messaging Release 6.32.2
• OpenCode Systems USSD Gateway OC Release 6.32.2
• Web-based control panel component

Discovery Timeline

• 2026-03-05 - CVE CVE-2025-70614 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2025-70614

Vulnerability Analysis

This vulnerability represents a classic broken access control flaw where the application fails to properly validate whether an authenticated user has the authority to access resources belonging to a specific company or tenant. The web-based control panel accepts company or tenant identifier parameters without performing adequate authorization checks, allowing attackers to enumerate and access SMS messages from accounts they should not have permission to view.

In multi-tenant messaging gateway deployments, this vulnerability is particularly severe as it breaks the fundamental isolation between different organizations using the shared platform. An attacker with valid credentials for one tenant can potentially access confidential SMS communications from all other tenants on the system.

Root Cause

The root cause of CVE-2025-70614 lies in the absence of proper server-side authorization controls when processing requests containing company or tenant identifier parameters. The application trusts client-supplied identifiers without verifying that the authenticated user has legitimate access to the requested tenant's data. This missing access control check allows any authenticated user to bypass tenant boundaries by simply modifying the identifier parameter in their requests.

Attack Vector

The attack requires an authenticated session with minimal privileges on the OC Messaging / USSD Gateway web control panel. An attacker can exploit this vulnerability by intercepting legitimate requests to the SMS message viewing functionality and modifying the company or tenant identifier parameter to reference a different organization. By iterating through possible identifier values, an attacker can systematically enumerate and exfiltrate SMS messages from multiple tenants.

The attack can be executed through standard web browser developer tools or proxy utilities to intercept and modify HTTP requests. No specialized exploit code is required—simply changing numeric or string identifiers in API calls or form submissions is sufficient to access unauthorized data.

For technical details and proof-of-concept information, refer to the GitHub Gist PoC.

Detection Methods for CVE-2025-70614

Indicators of Compromise

• Unusual access patterns to SMS message endpoints from a single user session accessing multiple tenant identifiers
• Anomalous HTTP requests containing sequential or enumerated company/tenant ID values
• Authenticated users accessing significantly more tenant resources than expected for their assigned permissions
• Log entries showing cross-tenant data access attempts or parameter manipulation

Detection Strategies

• Implement logging and alerting for requests where the tenant identifier in the request differs from the authenticated user's assigned tenant
• Monitor for rapid successive requests with incrementing or varying company/tenant identifier parameters
• Deploy web application firewall (WAF) rules to flag parameter tampering attempts on tenant-specific endpoints
• Analyze access logs for users attempting to access resources outside their organizational scope

Monitoring Recommendations

• Enable detailed audit logging for all SMS message access operations including the requesting user and target tenant identifier
• Configure alerts for any cross-tenant access attempts or authorization failures
• Implement rate limiting on endpoints that accept tenant identifier parameters to slow enumeration attacks
• Review access logs regularly for patterns indicating IDOR exploitation attempts

How to Mitigate CVE-2025-70614

Immediate Actions Required

• Audit all user access to the OC Messaging / USSD Gateway control panel and identify any anomalous cross-tenant access patterns
• Implement additional server-side authorization checks to validate that authenticated users can only access their assigned tenant's resources
• Consider temporarily restricting access to the SMS message viewing functionality until a patch is available
• Review and rotate any credentials that may have been compromised through unauthorized message access

Patch Information

At the time of publication, no vendor patch information is available in the CVE data. Organizations should contact OpenCode Systems directly for information about security updates addressing this vulnerability. Monitor the vendor's security advisories for patch availability.

Workarounds

• Implement network-level access controls to restrict who can reach the web control panel
• Deploy a web application firewall with rules to detect and block parameter manipulation attempts
• Enable strict session validation that ties tenant access to user identity at the application layer
• Implement additional authentication requirements for accessing sensitive SMS message data
• Consider implementing row-level security at the database level as a defense-in-depth measure

# Example WAF rule concept for parameter validation
# Block requests where tenant_id doesn't match authenticated user's tenant
# Implementation varies by WAF vendor

# Network restriction example - limit access to admin subnet
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP