The Firefox and Firefox Focus UI for the Android custom tab feature only showed the "site" that was loaded, not the full hostname. User supplied content hosted on a subdomain of a site could have been used to fool a user into thinking it was content from a different subdomain of that site. This vulnerability affects Firefox < 144.
History

Wed, 15 Oct 2025 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google android
Mozilla
Mozilla firefox
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:o:google:android:-:*:*:*:*:*:*:*
Vendors & Products Google
Google android
Mozilla
Mozilla firefox

Wed, 15 Oct 2025 14:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-451
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 14 Oct 2025 13:00:00 +0000

Type Values Removed Values Added
Description The Firefox and Firefox Focus UI for the Android custom tab feature only showed the "site" that was loaded, not the full hostname. User supplied content hosted on a subdomain of a site could have been used to fool a user into thinking it was content from a different subdomain of that site. This vulnerability affects Firefox < 144.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2025-10-14T12:27:38.204Z

Updated: 2025-10-15T13:19:42.977Z

Reserved: 2025-10-13T19:50:22.446Z

Link: CVE-2025-11720

cve-icon Vulnrichment

Updated: 2025-10-15T13:18:37.511Z

cve-icon NVD

Status : Analyzed

Published: 2025-10-14T13:15:38.400

Modified: 2025-10-15T18:10:00.430

Link: CVE-2025-11720

cve-icon Redhat

No data.