Disclosure summary
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 was fixed in Firefox 144.
Source-reported weakness categories
CWE-451
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2025-11720
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| mozilla | firefox | * {"versionEndExcluding":"144.0"} |
Original records & references
- NIST NVD record
- CVE Program record
- bugzilla.mozilla.org — Issue Tracking, Permissions Required
- bugzilla.mozilla.org — Issue Tracking, Permissions Required
- www.mozilla.org — Vendor Advisory
PUBLISHED 2025-10-14T09:15:38-04:00
MODIFIED 2026-10-08T08:10:00-04:00
INGESTED 2026-10-08T12:30:42-04:00