CVE-2025-11720The Firefox and Firefox Focus UI for the Android custom tab feature only showed the "site" that was loaded, not the full hostname.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.1 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-451
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
mozilla firefox mozilla:firefox | before 144.0 | NVD |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1979534issue-tracking, permissions-required
- https://bugzilla.mozilla.org/show_bug.cgi?id=1984370issue-tracking, permissions-required
- https://www.mozilla.org/security/advisories/mfsa2025-81/vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.