CVE-2025-2830

EUVD-2025-10970

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 was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.

Path Traversal

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	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: Unknown

Affected Products (NVD)

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

bookworm	1:140.6.0esr-1~deb12u1 fixed
bookworm (security)	1:140.9.1esr-1~deb12u1 fixed
bullseye	vulnerable
bullseye (security)	1:140.9.1esr-1~deb11u1 fixed
forky	1:140.9.0esr-1 fixed
sid	1:140.9.1esr-1 fixed
trixie	1:140.8.0esr-1~deb13u1 fixed
trixie (security)	1:140.9.1esr-1~deb13u1 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/