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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.006 (46.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Mozilla Thunderbird — versions unspecified
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.10
Weakness classification (CWE)
References
- www.mozilla.org/security/advisories/mfsa2020-18/ (Vendor Advisory)
- bugzilla.mozilla.org/show_bug.cgi (Patch, Issue Tracking, Vendor Advisory)
- usn.ubuntu.com/4373-1/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202005-03 (Third Party Advisory)
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.