Is CVE-2025-11720 actively exploited?

No active exploitation of CVE-2025-11720 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-11720 be exploited remotely?

Yes. CVE-2025-11720 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-11720?

CVE-2025-11720 has a CVSS score of 8.1 (HIGH).

HOME VULNERABILITIESCVE-2025-11720

HIGH

CVE-2025-11720

CWE-451Published: October 14, 2025· Updated: Jun 17, 2026

8.1

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2025-11720 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 8.1.