#VU117002 Spoofing attack in Firefox for Android and Firefox Focus for Android - CVE-2025-11720
Published: October 14, 2025
Vulnerability identifier: #VU117002
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-11720
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Firefox for Android
Firefox Focus for Android
Firefox for Android
Firefox Focus for Android
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of user-supplied data. The Firefox and Firefox Focus UI for the Android custom tab feature only showes the "site" that was loaded, not the full hostname, leading to a spoofing attack.
Remediation
Install updates from vendor's website.