Vulnerability in Mozilla Firefox Focus
CVE-2025-10290
Opening links via the contextual menu in Focus iOS for certain URL schemes would fail to load but would not refresh the toolbar correctly, allowing attackers to spoof websites if users were coerced into opening a link explicitly through a long-press. This vulnerability was fixed in Focus for iOS 143.0.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (15.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Mozilla Firefox Focus
- Mozilla Focus For iOS — versions 143.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2025-76/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-10290?
- CVE-2025-10290 is a medium-severity vulnerability in Mozilla Firefox Focus, classified under User Interface (UI) Misrepresentation of Critical Information. CVSS score: 6.5/10. Published 2025-09-16.
- How severe is CVE-2025-10290?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-10290 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.