CVE-2025-1941: Lock screen setting bypass in Firefox Focus for Android

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-03-04 · updated 2026-10-05
Weakness: CWE-284

Description

Under certain circumstances, a user opt-in setting that Focus should require authentication before use could have been be bypassed (distinct from CVE-2025-0245). This vulnerability was fixed in Firefox 136.

Affected products

Mozilla Firefox: before 136.0 — fixed in 136.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 136.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1944665
https://www.mozilla.org/security/advisories/mfsa2025-14/

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