CVE-2025-0246: Address bar spoofing using an invalid protocol scheme on Firefox for Android

Severity: medium (CVSS 6.5 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: 2025-01-07 · updated 2026-10-05

Description

When using an invalid protocol scheme, an attacker could spoof the address bar. *Note: This issue only affected Android operating systems. Other operating systems are unaffected.* *Note: This issue is a different issue from CVE-2025-0244. This vulnerability was fixed in Firefox 134.

Affected products

Mozilla Firefox: before 134.0 — fixed in 134.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 134.0. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1912709
https://www.mozilla.org/security/advisories/mfsa2025-01/

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