CVE-2025-2830

15.04.2025, 15:16

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 affects Thunderbird < 137.0.2 and Thunderbird < 128.9.2.

Path Traversal

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	6.3 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
mozilla	CNA	---				---
CISA-ADP	ADP	6.3 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Base Score

CVSS 3.x

EPSS Score

Percentile: 16%

Vendor	Product	Version
mozilla	thunderbird	𝑥 < 128.9.2
mozilla	thunderbird	129.0 ≤ 𝑥 < 137.0.2

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

thunderbird

bullseye	vulnerable
bullseye (security)	1:128.12.0esr-1~deb11u1 fixed
bookworm	1:128.10.0esr-1~deb12u1 fixed
bookworm (security)	1:128.12.0esr-1~deb12u1 fixed
trixie	1:128.12.0esr-1 fixed
sid	1:128.12.0esr-1 fixed

Common Weakness Enumeration

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1956379

https://www.mozilla.org/security/advisories/mfsa2025-26/

https://www.mozilla.org/security/advisories/mfsa2025-27/