CVE-2025-14750: Privilege Escalation Vulnerability

CVE-2025-14750 Overview

CVE-2025-14750 is a privilege escalation vulnerability stemming from insufficient verification of externally controllable inputs that the web application assumes to be immutable. This flaw allows a low-privileged authenticated user to manipulate request parameters and potentially elevate their privileges to account-level administrative access.

Critical Impact

Low-privileged users can manipulate assumed-immutable parameters to escalate privileges and gain unauthorized access to account-level controls.

Affected Products

• Industrial Control System (ICS) web application (specific vendor not disclosed)
• Web-based management interfaces with improper parameter validation

Discovery Timeline

• 2026-01-22 - CVE CVE-2025-14750 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2025-14750

Vulnerability Analysis

This vulnerability is classified under CWE-472 (External Control of Assumed-Immutable Web Parameter). The core issue lies in the application's trust model, where certain input parameters are treated as immutable or server-controlled when they are actually accessible and modifiable by external users. The attack requires low privileges and can be executed over the network without user interaction, making it particularly concerning for industrial control system environments.

The vulnerability affects web application interfaces that fail to implement proper server-side validation of privilege-related parameters. When a low-privileged user submits requests to the application, they can intercept and modify parameters that control access levels, role assignments, or account permissions.

Root Cause

The root cause is improper input validation where the application assumes certain web parameters (such as role identifiers, permission flags, or account privilege indicators) cannot be modified by end users. This assumption is flawed because HTTP parameters, hidden form fields, cookies, and other client-side data can all be manipulated by attackers using browser developer tools, proxy interceptors, or custom scripts.

The application fails to perform server-side verification to ensure that privilege-related parameters match the authenticated user's actual authorization level, allowing attackers to inject elevated privilege values.

Attack Vector

The attack is network-based and can be executed by any authenticated user with low privileges. The attacker intercepts legitimate requests to the web application and modifies parameters related to privilege levels before forwarding them to the server. Since the server does not properly validate these parameters against the user's actual authorization state, the modified values are accepted.

For example, an attacker might modify a hidden form field containing a user role identifier, change a cookie value that indicates permission levels, or alter URL parameters that control access to administrative functions. The lack of server-side validation allows these manipulated requests to succeed.

Detection Methods for CVE-2025-14750

Indicators of Compromise

• Unexpected privilege changes in user accounts without corresponding administrative actions in audit logs
• Requests containing modified role or permission parameters that do not match the authenticated user's profile
• Anomalous access patterns where low-privileged users access administrative endpoints

Detection Strategies

• Implement web application firewall (WAF) rules to detect parameter tampering attempts on privilege-related fields
• Monitor application logs for discrepancies between user authentication tokens and requested privilege levels
• Enable detailed audit logging for all privilege modification operations and review for unauthorized changes

Monitoring Recommendations

• Deploy real-time alerting for any privilege escalation events that bypass normal administrative workflows
• Correlate authentication logs with authorization events to identify mismatched privilege assertions
• Review ICS network traffic for unexpected administrative commands from non-administrative user sessions

How to Mitigate CVE-2025-14750

Immediate Actions Required

• Review and audit all web application endpoints that handle privilege-related parameters
• Implement strict server-side validation for all authorization decisions regardless of client-submitted values
• Apply the principle of least privilege and ensure users cannot request elevated access through parameter manipulation

Patch Information

Consult the CISA ICS Advisory ICSA-26-022-05 for vendor-specific patch information and remediation guidance. Organizations should contact their ICS vendor directly for security updates addressing this vulnerability.

Workarounds

• Remove or disable any client-side parameters that control privilege levels and implement server-side session-based authorization instead
• Deploy input validation middleware that rejects requests with unexpected or elevated privilege parameters
• Implement additional authentication requirements for any actions that modify user privileges or access levels

# Example: Web server configuration to log suspicious parameter modifications
# Add to your web application logging configuration
# Monitor for attempts to modify privilege-related parameters

# Apache mod_security rule example (conceptual)
# SecRule ARGS:role|ARGS:privilege|ARGS:admin "@rx (admin|superuser|elevated)" \
#     "id:1001,phase:2,log,msg:'Potential privilege parameter tampering detected'"