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vuln-cve/data/2025/6xxx/CVE-2025-6427.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-6427",
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"state": "PUBLISHED",
"assignerShortName": "mozilla",
"dateReserved": "2025-06-20T14:51:31.244Z",
"datePublished": "2025-06-24T12:28:01.317Z",
"dateUpdated": "2026-04-13T14:31:00.300Z"
},
"containers": {
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"status": "unaffected",
"version": "140",
"lessThanOrEqual": "*",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"status": "unaffected",
"version": "140",
"lessThanOrEqual": "*",
"versionType": "rpm"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "An attacker was able to bypass the `connect-src` directive of a Content Security Policy by manipulating subdocuments. This would have also hidden the connections from the Network tab in Devtools. This vulnerability was fixed in Firefox 140 and Thunderbird 140.",
"supportingMedia": [
{
"type": "text/html",
"base64": false,
"value": "An attacker was able to bypass the <code>connect-src</code> directive of a Content Security Policy by manipulating subdocuments. This would have also hidden the connections from the Network tab in Devtools. This vulnerability was fixed in Firefox 140 and Thunderbird 140."
}
]
}
],
"title": "connect-src Content Security Policy restriction could be bypassed",
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1966927"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2025-51/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2025-54/"
}
],
"credits": [
{
"lang": "en",
"value": "Alan Li (lebr0nli)"
}
],
"providerMetadata": {
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla",
"dateUpdated": "2026-04-13T14:31:00.300Z"
}
},
"adp": [
{
"problemTypes": [
{
"descriptions": [
{
"type": "CWE",
"cweId": "CWE-693",
"lang": "en",
"description": "CWE-693 Protection Mechanism Failure"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.1,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
}
},
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2025-06-25T14:20:57.559919Z",
"id": "CVE-2025-6427",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2025-06-25T14:27:22.224Z"
}
}
]
}
}