CVE-2025-2830

CVE-2025-2830 is a medium-severity vulnerability affecting Mozilla Thunderbird versions prior to 137.0.2 and 128.9.2. An attacker can craft a malformed attachment filename in a multipart message, tricking Thunderbird into including a directory listing of /tmp (or similar on Windows) when the message is forwarded or edited. This could lead to sensitive information disclosure from the victim's system. The vulnerability has a CVSS score of 6.3, indicating a network-based attack requiring user interaction with low complexity, resulting in low impact to confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or KEV listing, though it has garnered some community discussion and media coverage.