How to fix CVE-2019-25420?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Is Dome Firewall affected by CVE-2019-25420?

Organizations using Comodo Dome Firewall 2.7.0 should be aware of moderate risk from CVE-2019-25420, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available.

CVE-2019-25420

MEDIUM

2026-02-19 [email protected]

6.1

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:03 vuln.today

PoC Detected

Feb 20, 2026 - 17:17 vuln.today

Public exploit code

CVE Published

Feb 19, 2026 - 13:16 nvd

MEDIUM 6.1

Description

Comodo Dome Firewall 2.7.0 contains a reflected cross-site scripting vulnerability that allows attackers to inject malicious scripts by submitting crafted input to the snat endpoint. Attackers can send POST requests with JavaScript payloads in the port or snat_to_ip parameters to execute arbitrary scripts in users' browsers.

Analysis

Technical Context

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the port or snat_to_ip component of Dome Firewall. Comodo Dome Firewall 2.7.0 contains a reflected cross-site scripting vulnerability that allows attackers to inject malicious scripts by submitting crafted input to the snat endpoint. Attackers can send POST requests with JavaScript payloads in the port or snat_to_ip parameters to execute arbitrary scripts in users' browsers.

Affected Products

Vendor: Comodo. Product: Dome Firewall. Component: port or snat_to_ip.

Remediation

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.0

CVSS: +30

POC: +20

CVE-2019-25420 vulnerability details – vuln.today

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CVE-2019-25420

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CVE-2019-25420

CVSS Vector

Lifecycle Timeline

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Description

Analysis

Technical Context

Affected Products

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External POC / Exploit Code