Main Vulnerability Database Vulnerabilities #VU115735

Security features bypass in Firefox for Android and Mozilla Firefox - CVE-2025-10531

Published: September 17, 2025

Vulnerability identifier: #VU115735

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-10531

CWE-ID: CWE-254

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists die to an error in the Web Compatibility: Tooling component. A remote attacker can bypass implemented security restrictions.

Firefox for Android
Mozilla Firefox
Anolis OS
Mozilla Thunderbird
firefox

Install updates from vendor's website.

Firefox for Android - update to 143.0
Mozilla Firefox - update to 143.0
Mozilla Thunderbird - update to 143.0
firefox - update to 140.3.0-1