Unauthenticated browser script execution via username reflection
Published Feb 19, 2026 · Updated Feb 19, 2026
Reflected XSS in Comodo Dome Firewall 2.7.0 allows remote attackers to execute JavaScript through the vpn_users username parameter. The vpn_users POST response reflects the username value as executable markup rather than encoding it for the response context. No authentication is required to submit the request, but a victim must load its response; successful exploitation runs code in that browser's Dome Firewall origin.
Summary
What happened
Reflected XSS in Comodo Dome Firewall 2.7.0 allows remote attackers to execute JavaScript through the vpn_users username parameter. The vpn_users POST response reflects the username value as executable markup rather than encoding it for the response context. No authentication is required to submit the request, but a victim must load its response; successful exploitation runs code in that browser's Dome Firewall origin.
The record
- CVE
- CVE-2019-25430
- Published
- Feb 19, 2026
- Updated
- Feb 19, 2026
- Vendor
- Comodo Group, Inc.
- Product
- Comodo Dome Firewall
- Classifications
- CWE-79, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 19, 2026CVE publishedPublication date reported by the CVE source.
- Feb 19, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=2.7.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Comodo Dome Firewall 2.7.0 - Cross-Site Scriptingproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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