CVE-2021-38373

low

Published — · Modified —

CVSS v3

—

CVSS v2

—

VIR risk

2.5

Description

In KDE KMail 19.12.3 (aka 5.13.3), the SMTP STARTTLS option is not honored (and cleartext messages are sent) unless "Server requires authentication" is checked.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-38373

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-38373.html

OS impact

OS	Version	Status	Fixed in
arch		fixed	`21.12.0-1`
sles		affected
debian	bookworm	fixed	`21.12.3-2`
debian	bullseye	affected
debian	forky	fixed	`21.12.3-2`
debian	sid	fixed	`21.12.3-2`
debian	trixie	fixed	`21.12.3-2`

References

https://www.suse.com/security/cve/CVE-2021-38373.html
https://security-tracker.debian.org/tracker/CVE-2021-38373

Verify integrity in audit chain (admin only). AS-IS.