CVE-2019-25402 Comodo Dome Firewall 2.7.0 Cross-Site Scripting via login

Medium 5.1 Published 19 Feb 2026 Updated 24 May 2026

Unauthenticated attackers can inject malicious scripts via the login username field, potentially executing arbitrary JavaScript in victim browsers.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2019-25402?

CVE-2019-25402 is a medium-severity cross-site scripting vulnerability in Comodo Dome Firewall, published on 19 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Comodo Dome Firewall 2.7.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting crafted input to the username parameter. Attackers can send POST requests to the login endpoint with script payloads in the username field to execute arbitrary JavaScript in users' browsers.

Weakness: CWE-79

Which versions are affected by CVE-2019-25402?

It affects 1 product.

Products include Comodo Dome Firewall.

How do I fix CVE-2019-25402?

No fix has been published for CVE-2019-25402 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2019-25402 being exploited?

There is no known exploitation of CVE-2019-25402 in the wild and no public exploit code.

Sources

Also known as GHSA-vjwf-9x67-fj96.