Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2025-6431 Details

Description

When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: CISA-ADPCVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=1942716	[email protected]	Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-51/	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-285	Improper Authorization	CISA-ADP

Affected Products

Product	Versions
mozilla firefox	< 140.0
CPE cpe:2.3:a:mozilla:firefox:::::-:::* Remediation No remediation found in references.
google android	All versions
CPE cpe:2.3:o:google:android:-:::::::* Remediation No remediation found in references.

Change History

6 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Apr 13, 2026	CVE Modified	[email protected]
Jul 3, 2025	Initial Analysis	[email protected]
Jun 25, 2025	CVE Modified	CISA-ADP
Jun 24, 2025	New CVE Received	[email protected]