CVE-2025-14349: FlexCity/Kiosk Privilege Escalation Flaw

CVE-2025-14349 Overview

CVE-2025-14349 is a critical privilege escalation vulnerability affecting Universal Software Inc. FlexCity/Kiosk software. The vulnerability combines two dangerous weaknesses: Privilege Defined With Unsafe Actions (CWE-267) and Missing Authentication for Critical Function. This combination allows authenticated attackers with low privileges to access functionality not properly constrained by Access Control Lists (ACLs) and escalate their privileges within the system.

The vulnerability affects network-accessible FlexCity/Kiosk installations, making it particularly dangerous for organizations deploying these kiosk solutions in public-facing or enterprise environments.

Critical Impact

Attackers with low-level access can exploit missing authentication on critical functions to achieve full privilege escalation, potentially gaining complete control over affected kiosk systems with high impact to confidentiality, integrity, and availability.

Affected Products

• Universal Software Inc. FlexCity/Kiosk versions 1.0 through 1.0.35
• FlexCity/Kiosk installations accessible over the network
• Systems running unpatched versions prior to 1.0.36

Discovery Timeline

• 2026-02-13 - CVE-2025-14349 published to NVD
• 2026-02-13 - Last updated in NVD database

Technical Details for CVE-2025-14349

Vulnerability Analysis

This vulnerability stems from improper implementation of access controls within the FlexCity/Kiosk application. The software defines privileges with unsafe actions, meaning that certain elevated capabilities are granted without proper validation or restriction. Combined with missing authentication requirements for critical functions, this creates a pathway for privilege escalation attacks.

The network attack vector indicates that exploitation can occur remotely without requiring physical access to the kiosk device. Once an attacker has obtained low-privilege access to the system, they can leverage the improperly constrained functionality to elevate their permissions.

The successful exploitation results in high impact across all three security pillars: confidentiality (access to sensitive data), integrity (ability to modify system configurations and data), and availability (potential to disrupt kiosk operations).

Root Cause

The root cause of CVE-2025-14349 lies in the application's failure to implement proper access control mechanisms around critical functions. Specifically:

1. CWE-267 - Privilege Defined With Unsafe Actions: The application grants privileges that include inherently dangerous operations without appropriate safeguards or scope limitations.

2. Missing Authentication for Critical Functions: Administrative or elevated functions within the application can be accessed without requiring proper authentication, allowing low-privileged users to invoke operations that should be restricted.

The combination of these weaknesses creates a privilege escalation chain where attackers can bypass intended access restrictions and gain unauthorized elevated access.

Attack Vector

The attack is network-based and requires only low-level authentication to initiate. An attacker would typically:

1. Obtain low-privilege access to a FlexCity/Kiosk system through legitimate credentials or other means
2. Identify critical functions that lack proper authentication enforcement
3. Invoke these unprotected functions to access functionality beyond their authorized scope
4. Leverage the improperly defined privileges to escalate to higher permission levels

The attack requires no user interaction, meaning it can be executed silently once an attacker has established initial access. The vulnerability does not change the scope of the attack, meaning the compromised component and impacted component remain within the same security authority.

For detailed technical information, refer to the USOM Security Notification TR-26-0065.

Detection Methods for CVE-2025-14349

Indicators of Compromise

• Unexpected privilege elevation events in kiosk system logs
• Access to administrative functions from non-administrative user sessions
• Unusual API calls or function invocations from low-privilege accounts
• Authentication logs showing access to protected resources without corresponding authorization

Detection Strategies

• Monitor authentication and authorization logs for anomalous access patterns
• Implement logging on all critical administrative functions to detect unauthorized invocations
• Deploy network traffic analysis to identify exploitation attempts against kiosk systems
• Conduct regular access control audits to verify proper enforcement of privilege boundaries

Monitoring Recommendations

• Enable verbose logging on all FlexCity/Kiosk installations
• Configure SIEM alerts for privilege escalation indicators specific to kiosk environments
• Establish baseline behavior patterns for legitimate kiosk operations to detect deviations
• Monitor network connections to kiosk systems for unexpected administrative traffic

How to Mitigate CVE-2025-14349

Immediate Actions Required

• Upgrade all FlexCity/Kiosk installations to version 1.0.36 or later immediately
• Restrict network access to kiosk systems to authorized management networks only
• Audit current user privileges and remove unnecessary access
• Review system logs for evidence of prior exploitation attempts

Patch Information

Universal Software Inc. has addressed this vulnerability in FlexCity/Kiosk version 1.0.36. Organizations should prioritize updating affected systems to this version or later. Additional details may be available through the USOM Security Notification TR-26-0065.

Workarounds

• Implement network segmentation to isolate kiosk systems from general network traffic
• Deploy additional authentication layers such as VPN requirements for remote management access
• Apply principle of least privilege to all user accounts accessing kiosk systems
• Consider disabling remote management capabilities until patches can be applied

# Network segmentation example for kiosk isolation
# Restrict kiosk management interface to specific management VLAN
iptables -A INPUT -p tcp --dport 443 -s 10.0.100.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP