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CVE-2025-6434

🗓️ 24 Jun 2025 12:28:04Reported by mozillaType 
cve
 cve
🔗 web.nvd.nist.gov👁 76 Views

Firefox < 140 lacks anti-clickjacking delay on HTTPS-Only exception page, allowing HTTP exploitation.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
FreeBSD
firefox -- multiple vulnerabilities
24 Jun 202500:00
freebsd
ATTACKERKB
CVE-2025-6434
24 Jun 202512:28
attackerkb
AlpineLinux
CVE-2025-6434
24 Jun 202513:15
alpinelinux
AstraLinux
Astra Linux – Vulnerability in Firefox
16 Jun 202511:28
astralinux
BDU FSTEC
The vulnerability of the HTTPS-Only Mode mode in the Mozilla Firefox browser allows a hacker to carry out a clickjacking attack.
27 Jun 202500:00
bdu_fstec
Circl
CVE-2025-6434
24 Jun 202516:50
circl
CNNVD
Mozilla Firefox 安全漏洞
24 Jun 202500:00
cnnvd
Cvelist
CVE-2025-6434 HTTPS-Only exception screen lacked anti-clickjacking delay
24 Jun 202512:28
cvelist
Debian CVE
CVE-2025-6434
24 Jun 202512:28
debiancve
EUVD
EUVD-2025-21375
3 Oct 202520:07
euvd
Rows per page
NVD
Node
mozillafirefoxRange<140.0-
[
  {
    "product": "Firefox",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  },
  {
    "product": "Thunderbird",
    "vendor": "Mozilla",
    "versions": [
      {
        "status": "unaffected",
        "version": "140",
        "lessThanOrEqual": "*",
        "versionType": "rpm"
      }
    ]
  }
]

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17 Jun 2026 10:01Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.14.3
EPSS0.00229
SSVC
76