CVE-2020-15685

8.8 highEPSS 0.9%

High (8.8) in mozilla thunderbird. EPSS 0.9% chance of exploitation in the next 30 days.

During the plaintext phase of the STARTTLS connection setup, protocol commands could have been injected and evaluated within the encrypted session. This vulnerability affects Thunderbird < 78.7.

Severity

CVSS 3.1

8.8 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-31)
CWE: CWE-77
Published: 2022-12-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

mozilla:thunderbird

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1622640
https://www.mozilla.org/security/advisories/mfsa2021-05/
https://bugzilla.mozilla.org/show_bug.cgi?id=1622640
https://www.mozilla.org/security/advisories/mfsa2021-05/

Check your stack JSON