Vulnerability in Mozilla Thunderbird
CVE-2020-12397
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.
EPSS: 0.006 (45.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.
Affected products
- Mozilla Thunderbird — versions unspecified
- Canonical Ubuntu_linux — versions 16.04, 18.04, 19.10
Weakness classification (CWE)
References
- security@mozilla.org (x_refsource_MISC, Vendor Advisory)
- security@mozilla.org (Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)
- security@mozilla.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- security@mozilla.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-12397?
- CVE-2020-12397 is a medium-severity vulnerability in Mozilla Thunderbird, classified under Origin Validation Error. CVSS score: 4.3/10. Published 2020-05-22.
- How severe is CVE-2020-12397?
- Medium severity. CVSS v3 base score is 4.3 out of 10.