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, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

INFO

Published Date :

2025-06-24T12:28:00.819Z

Last Modified :

2025-11-03T20:07:03.248Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2025-6429 vulnerability.

Vendors Products
Mozilla
  • Firefox
  • Firefox Esr
Redhat
  • Enterprise Linux
  • Rhel Aus
  • Rhel E4s
  • Rhel Els
  • Rhel Eus
  • Rhel Tus
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-6429.

URL Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1970658 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html cve-icon
https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-6429 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-6429 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-51/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-53/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-53/#CVE-2025-6429 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-54/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-55/ cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
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Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact