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 affects Firefox < 140 and Thunderbird < 140.
References
| Link | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1966927 | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2025-51/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-54/ |
Configurations
History
14 Jul 2025, 19:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-06-24 13:15
Updated : 2025-07-14 19:15
NVD link : CVE-2025-6427
Mitre link : CVE-2025-6427
CVE.ORG link : CVE-2025-6427
JSON object : View
Products Affected
mozilla
- firefox
CWE
CWE-693
Protection Mechanism Failure