CVE-2025-40897: Threat Intelligence Auth Bypass Flaw

CVE-2025-40897 Overview

An access control vulnerability was discovered in the Threat Intelligence functionality due to a specific access restriction not being properly enforced for users with view-only privileges. An authenticated user with view-only privileges for the Threat Intelligence functionality can perform administrative actions on it, altering the rules configuration, and/or affecting their availability.

This vulnerability is classified as CWE-863 (Incorrect Authorization), which occurs when the software performs authorization checks incorrectly, allowing unauthorized users to perform privileged operations they should not have access to.

Critical Impact

Authenticated users with view-only privileges can bypass access controls to perform unauthorized administrative actions on Threat Intelligence rules, potentially compromising the integrity and availability of security configurations.

Affected Products

• Nozomi Networks Threat Intelligence Platform (specific versions not disclosed)

Discovery Timeline

• April 15, 2026 - CVE CVE-2025-40897 published to NVD
• April 15, 2026 - Last updated in NVD database

Technical Details for CVE-2025-40897

Vulnerability Analysis

This vulnerability represents a Broken Access Control flaw where the authorization mechanism fails to properly enforce privilege boundaries within the Threat Intelligence functionality. The system does not adequately validate whether authenticated users have the appropriate permission level before allowing them to execute administrative operations.

The vulnerability enables privilege escalation within the application context, allowing users who should only have read-only access to modify threat intelligence rules and configurations. This can lead to both integrity and availability impacts, as attackers could alter security rules or disable critical threat detection capabilities.

Root Cause

The root cause of this vulnerability is improper authorization validation in the Threat Intelligence module. The application fails to perform adequate privilege checks when processing requests for administrative actions, relying solely on authentication without properly verifying the user's assigned role and permissions. This allows view-only users to access and execute privileged administrative endpoints that should be restricted to users with elevated permissions.

Attack Vector

The attack vector is network-based, requiring the attacker to be an authenticated user with at least view-only privileges to the Threat Intelligence functionality. The attack does not require user interaction and can be executed remotely. An attacker would authenticate with their legitimate credentials and then issue requests to administrative endpoints that modify or delete threat intelligence rules, bypassing the intended access control restrictions.

The vulnerability can be exploited by crafting HTTP requests to administrative API endpoints that should be restricted but are accessible due to the missing authorization checks. This allows the attacker to alter rules configuration or impact the availability of the Threat Intelligence service.

Detection Methods for CVE-2025-40897

Indicators of Compromise

• Unexpected modifications to Threat Intelligence rules by users with view-only roles
• Audit log entries showing administrative actions performed by non-administrative accounts
• Configuration changes to threat intelligence settings without corresponding authorized change requests
• Unusual API request patterns from view-only user accounts targeting administrative endpoints

Detection Strategies

• Implement audit logging to capture all administrative actions on Threat Intelligence configurations with associated user identity
• Monitor for privilege escalation attempts by correlating user role assignments with actions performed
• Deploy SIEM rules to alert on administrative API calls from accounts assigned view-only permissions
• Review access control logs for discrepancies between assigned roles and executed operations

Monitoring Recommendations

• Enable verbose logging for all Threat Intelligence administrative endpoints
• Configure alerts for any configuration changes to threat intelligence rules
• Regularly audit user permissions and compare against actual activity logs
• Implement real-time monitoring for unauthorized access attempts to administrative functions

How to Mitigate CVE-2025-40897

Immediate Actions Required

• Review and audit all user accounts with access to Threat Intelligence functionality
• Temporarily restrict access to Threat Intelligence administrative functions to only essential personnel
• Enable enhanced logging and monitoring for all Threat Intelligence configuration changes
• Apply vendor-provided patches as soon as they become available

Patch Information

Nozomi Networks has released a security advisory addressing this vulnerability. Organizations should review the Nozomi Networks Security Advisory for detailed patching instructions and updated software versions. Apply the vendor-provided security updates as soon as possible to remediate this access control vulnerability.

Workarounds

• Implement network-level access controls to restrict access to administrative interfaces
• Deploy a web application firewall (WAF) with rules to block unauthorized administrative requests
• Temporarily disable direct access to Threat Intelligence administrative functions for view-only users
• Implement additional authentication requirements for administrative actions until patches are applied

# Configuration example - Review user permissions
# Audit all users with access to Threat Intelligence module
# Ensure view-only users do not have administrative capabilities

# Example: Review access control configuration
# Verify role-based access control settings are properly enforced
# Restrict administrative endpoints to authorized roles only