Input validation error in Firefox for Android - CVE-2025-4086
Published: April 29, 2025
Vulnerability identifier: #VU108052
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-4086
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox for Android
Firefox for Android
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a spoofing attack.
The vulnerability exists due to insufficient validation of file names. A remote attacker can trick the victim into downloading a specially crafted file containing a large number of encoded newline characters in its name and obscure the file's extension when displayed in the download dialog.
How to mitigate CVE-2025-4086
Install updates from vendor's website.