CVE-2025-8204Public exploitNetwork attack vector

Website spoofing via disabled HSTS enforcement

Published Jul 26, 2025 · Updated Jul 28, 2025

Improper HSTS enforcement in Comodo Dragon 134.0.6998.179 and earlier allows remote attackers to present spoofed HTTPS sites. Dragon disables HSTS enforcement and offers a proceed option after an invalid certificate on an HSTS-protected domain instead of blocking the connection. Exploitation requires traffic or DNS redirection and user interaction; a successful attempt lets the spoofed site replace trusted web content.

CVSS severityUnavailable
Unscored
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Improper HSTS enforcement in Comodo Dragon 134.0.6998.179 and earlier allows remote attackers to present spoofed HTTPS sites. Dragon disables HSTS enforcement and offers a proceed option after an invalid certificate on an HSTS-protected domain instead of blocking the connection. Exploitation requires traffic or DNS redirection and user interaction; a successful attempt lets the spoofed site replace trusted web content.

The record

CVE
CVE-2025-8204
Published
Jul 26, 2025
Updated
Jul 28, 2025
Vendor
Comodo Group, Inc.
Product
Comodo Dragon Browser
Classifications
CWE-358, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=134.0.6998.179

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Comodo Group, Inc. · Comodo Dragon Browserversion=134.0.6998.179

Published CVSS scores

2.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
3.1VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
3.1VulDBCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
2.6VulDBAV:N/AC:H/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR

CVSS describes severity. EPSS estimates exploitation probability.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-358Security Check for Standard
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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