#VU109191 Input validation error in Mozilla Thunderbird - CVE-2025-3877
Published: May 14, 2025
Vulnerability identifier: #VU109191
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-3877
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mozilla Thunderbird
Mozilla Thunderbird
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to incorrect handling of "mailbox:///" links. A remote attacker can trick the victim into clicking on such a link and force the application into downloading arbitrary file or leak credentials.
Remediation
Install updates from vendor's website.