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CVE-2025-6427
Published: Jun 24, 2025
Modified: Apr 13, 2026
PUBLISHED
Description
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.
| Vendor | Product | Versions |
|---|---|---|
Mozilla | Firefox | unaffected 140 - <= * |
Mozilla | Thunderbird | unaffected 140 - <= * |
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