Bug 2374561 (CVE-2025-6429) - CVE-2025-6429 firefox: Incorrect parsing of URLs could have allowed embedding of youtube.com
Summary: CVE-2025-6429 firefox: Incorrect parsing of URLs could have allowed embedding...
Keywords:
Status: NEW
Alias: CVE-2025-6429
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-06-24 13:01 UTC by OSIDB Bzimport
Modified: 2025-06-24 19:45 UTC (History)
5 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2025-06-24 13:01:34 UTC 
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.
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