Path Traversal in Mozilla Thunderbird
CVE-2025-2830
By crafting a malformed file name for an attachment in a multipart message, an attacker can trick Thunderbird into including a directory listing of /tmp when the message is forwarded or edited as a new message. This vulnerability could allow attackers to disclose sensitive information from the victim's system. This vulnerability is not limited to Linux; similar behavior has been observed on Windows as well. This vulnerability was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.003 (26.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.
Affected products
- Mozilla Thunderbird — versions 128.9.2, 137.0.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@mozilla.org (Permissions Required)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-2830?
- CVE-2025-2830 is a medium-severity vulnerability in Mozilla Thunderbird, classified under Path Traversal. CVSS score: 6.3/10. Published 2025-04-15.
- How severe is CVE-2025-2830?
- Medium severity. CVSS v3 base score is 6.3 out of 10.
- Is CVE-2025-2830 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.