{
  "threat_severity" : "Low",
  "public_date" : "2025-06-24T12:28:04Z",
  "bugzilla" : {
    "description" : "firefox: WebAuthn would allow a user to sign a challenge on a webpage with an invalid TLS certificate",
    "id" : "2374567",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2374567"
  },
  "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" : [ "If a user visited a webpage with an invalid TLS certificate, and granted an exception, the webpage was able to provide a WebAuthn challenge that the user would be prompted to complete.  This is in violation of the WebAuthN spec which requires \"a secure transport established without errors\". 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:\nIf a user visited a webpage with an invalid TLS certificate, and granted an exception, the webpage was able to provide a WebAuthn challenge that the user would be prompted to complete.  This is in violation of the WebAuthN spec which requires \"a secure transport established without errors\"." ],
  "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-2025-6433\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-6433\nhttps://bugzilla.mozilla.org/show_bug.cgi?id=1954033\nhttps://www.mozilla.org/security/advisories/mfsa2025-51/" ],
  "name" : "CVE-2025-6433",
  "csaw" : false
}