CVE-2019-25404: Comodo Dome Firewall Stored XSS Flaw

CVE-2019-25404 Overview

CVE-2019-25404 is a stored cross-site scripting (XSS) vulnerability in Comodo Dome Firewall 2.7.0 that allows authenticated attackers to inject malicious scripts by submitting crafted input through admin management parameters. Attackers can inject script payloads in the admin_name, name, and surname parameters via POST requests to the /korugan/admins endpoint, which are stored and executed when administrators access the interface.

Critical Impact

Authenticated attackers can inject persistent malicious scripts that execute in the context of other administrator sessions, potentially leading to session hijacking, credential theft, or unauthorized administrative actions on the firewall.

Affected Products

• Comodo Dome Firewall 2.7.0

Discovery Timeline

• 2026-02-19 - CVE CVE-2019-25404 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2019-25404

Vulnerability Analysis

This stored cross-site scripting vulnerability (CWE-79) exists in the administrative interface of Comodo Dome Firewall 2.7.0. The vulnerability allows authenticated users with access to the admin management functionality to inject arbitrary JavaScript code that gets stored server-side and subsequently executed in the browsers of other administrators who view the affected pages.

The attack surface is network-accessible, requiring low complexity to exploit but necessitating some level of authenticated access to the administrative interface. The vulnerability affects the confidentiality and integrity of the system at a limited scope, with potential to impact other users' sessions within the same administrative context.

Root Cause

The root cause of this vulnerability is improper input validation and output encoding in the admin user management functionality. The application fails to properly sanitize user-supplied input in the admin_name, name, and surname parameters before storing them in the database and subsequently rendering them in the administrative interface. This allows malicious script content to be persisted and executed whenever the affected data is displayed.

Attack Vector

The attack vector involves an authenticated attacker submitting a specially crafted POST request to the /korugan/admins endpoint. The attacker injects JavaScript code into one or more of the vulnerable parameters (admin_name, name, or surname). When another administrator accesses the admin management interface and the injected content is rendered, the malicious script executes in their browser context.

This stored XSS attack can be leveraged to steal session cookies, perform actions on behalf of the victim administrator, redirect users to malicious sites, or exfiltrate sensitive configuration data from the firewall management interface. Detailed technical information about the exploitation technique can be found in the Exploit-DB #46408 entry and the VulnCheck security advisory.

Detection Methods for CVE-2019-25404

Indicators of Compromise

• Unusual or encoded script content (such as <script>, javascript:, or encoded equivalents) in administrator account names or profile fields
• Administrative user records containing HTML entities or JavaScript event handlers in the admin_name, name, or surname fields
• Unexpected outbound connections from administrator browsers to external domains after accessing the admin interface

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block XSS payloads in POST requests to the /korugan/admins endpoint
• Enable detailed logging of all administrative actions and review logs for suspicious modifications to admin user profiles
• Deploy browser-based security controls that detect and report potential XSS execution attempts

Monitoring Recommendations

• Monitor HTTP POST requests to /korugan/admins for common XSS patterns including script tags, event handlers, and encoded payloads
• Set up alerts for modifications to administrator accounts that contain suspicious characters or encoding patterns
• Implement Content Security Policy (CSP) headers and monitor CSP violation reports for potential exploitation attempts

How to Mitigate CVE-2019-25404

Immediate Actions Required

• Review existing administrator accounts for signs of XSS payload injection in the admin_name, name, and surname fields
• Restrict access to the administrative interface to only trusted networks and users
• Implement additional input validation at the network perimeter using a WAF configured to block XSS patterns
• Consider temporarily disabling the ability to modify admin user profiles until a patch is applied

Patch Information

Contact Comodo for information regarding security patches for Dome Firewall 2.7.0. Review the Comodo Firewall product page for the latest version information and security updates. Organizations should upgrade to the latest available version that addresses this stored XSS vulnerability.

Workarounds

• Implement strict Content Security Policy (CSP) headers to prevent inline script execution
• Deploy a web application firewall with rules specifically targeting XSS payloads in form submissions
• Limit administrative access to the firewall interface to a minimal set of trusted users and networks
• Regularly audit administrator account fields for suspicious content that may indicate attempted exploitation

# Example WAF rule concept for blocking XSS in admin parameters
# Note: Specific syntax varies by WAF vendor

# Block requests containing script tags in admin form parameters
SecRule ARGS:admin_name|ARGS:name|ARGS:surname "@rx (?i)<script" \
    "id:100001,phase:2,deny,status:403,msg:'Potential XSS in admin parameters'"

# Block JavaScript event handlers in admin form parameters  
SecRule ARGS:admin_name|ARGS:name|ARGS:surname "@rx (?i)on\w+\s*=" \
    "id:100002,phase:2,deny,status:403,msg:'Potential XSS event handler in admin parameters'"