Vulnerability in Mozilla Thunderbird

CVE-2019-11739

Encrypted S/MIME parts in a crafted multipart/alternative message can leak plaintext when included in a a HTML reply/forward. This vulnerability affects Thunderbird < 68.1 and Thunderbird < 60.9.

EPSS: 0.009 (55.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2019-11739?
CVE-2019-11739 is a medium-severity vulnerability in Mozilla Thunderbird, classified under Cleartext Transmission of Sensitive Information. CVSS score: 6.5/10. Published 2019-09-27.
How severe is CVE-2019-11739?
Medium severity. CVSS v3 base score is 6.5 out of 10.