{
  "threat_severity" : "Low",
  "public_date" : "2025-06-24T12:28:04Z",
  "bugzilla" : {
    "description" : "firefox: HTTPS-Only exception screen lacked anti-clickjacking delay",
    "id" : "2374566",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2374566"
  },
  "cvss3" : {
    "cvss3_base_score" : "3.4",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N",
    "status" : "draft"
  },
  "details" : [ "The exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP. This vulnerability was fixed in Firefox 140 and Thunderbird 140.", "A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:\nThe exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP." ],
  "statement" : "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.",
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "rhel10/firefox-flatpak",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "firefox",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2025-6434\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-6434\nhttps://bugzilla.mozilla.org/show_bug.cgi?id=1955182\nhttps://www.mozilla.org/security/advisories/mfsa2025-51/" ],
  "name" : "CVE-2025-6434",
  "csaw" : false
}