Description
By encoding Unicode whitespace characters within the From email header, an attacker can spoof the sender email address that Thunderbird displays. This vulnerability affects Thunderbird < 68.8.0.
References (4)
Core 4
Core References
Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-18/
Issue Tracking, Patch, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1617370
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4373-1/
Third Party Advisory x_refsource_misc
https://security.gentoo.org/glsa/202005-03
Scores
CVSS v3
4.3
EPSS
0.0019
EPSS Percentile
41.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Details
CWE
CWE-346
Status
published
Products (5)
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
19.10
canonical/ubuntu_linux
20.04
mozilla/thunderbird
< 68.8.0
Published
May 22, 2020
Tracked Since
Feb 18, 2026