CVE - CVE-2025-6429

CVE-ID
CVE-2025-6429	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the URL specified in an `embed` tag. This could have bypassed website security checks that restricted which domains users were allowed to embed. This vulnerability affects Firefox < 140 and Firefox ESR < 128.12.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://bugzilla.mozilla.org/show_bug.cgi?id=1970658 URL:https://bugzilla.mozilla.org/show_bug.cgi?id=1970658 MISC:https://www.mozilla.org/security/advisories/mfsa2025-51/ URL:https://www.mozilla.org/security/advisories/mfsa2025-51/ MISC:https://www.mozilla.org/security/advisories/mfsa2025-53/ URL:https://www.mozilla.org/security/advisories/mfsa2025-53/
Assigning CNA
Mozilla Corporation
Date Record Created
20250620	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250620)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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