CVE catalog

CVE-2021-38373

ksmtp: CVE-2021-38373

Severity: Medium
Published: Aug 10, 2021, 3:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.53% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	ksmtp	sid	`26.08.2-2`	fixed
Debian	ksmtp	forky	`26.04.3-2`	fixed
Debian	ksmtp	trixie	`24.12.3-1`	fixed
Debian	ksmtp	bookworm	`22.12.3-1`	fixed
Ubuntu	kmailtransport	18.04	`17.04.3-0ubuntu1`	vulnerable
Ubuntu	kmailtransport	18.04	`17.08.3-0ubuntu2`	vulnerable
Ubuntu	kmailtransport	18.04	`17.08.3-0ubuntu3`	vulnerable
Ubuntu	kmailtransport	18.04	`17.12.2-0ubuntu1`	vulnerable
Ubuntu	kmailtransport	18.04	`17.12.3-0ubuntu3`	vulnerable
Ubuntu	kmailtransport	18.04	`17.12.3-0ubuntu4`	vulnerable
Ubuntu	ksmtp	18.04	`17.12.2-0ubuntu1`	vulnerable
Ubuntu	kmailtransport	20.04	`19.04.3-0ubuntu1`	vulnerable
Ubuntu	kmailtransport	20.04	`19.04.3-0ubuntu2`	vulnerable
Ubuntu	kmailtransport	20.04	`19.12.3-0ubuntu1`	vulnerable
Ubuntu	ksmtp	20.04	`19.04.3-0ubuntu1`	vulnerable
Ubuntu	ksmtp	20.04	`19.04.3-0ubuntu2`	vulnerable
Ubuntu	ksmtp	20.04	`19.12.3-0ubuntu1`	vulnerable
Ubuntu	ksmtp	20.04	`19.12.3-0ubuntu2`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ksmtp	source	sid	`21.12.3-2`	not yet assigned	Not reported	Not reported
Debian	ksmtp	source	forky	`21.12.3-2`	not yet assigned	Not reported	Not reported
Debian	ksmtp	source	trixie	`21.12.3-2`	not yet assigned	Not reported	Not reported
Debian	ksmtp	source	bookworm	`21.12.3-2`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libkpimsmtp5abi1]Fixed
Source package: [ksmtp]
Details (2)
- 22.12.3-1 · amd64 · bookworm
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · bookworm; dsa · ksmtp · debian · 12
- 22.12.3-1 · arm64 · bookworm
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · bookworm; dsa · ksmtp · debian · 12
[libkpimsmtp-data]Fixed
Source package: [ksmtp]
Details (2)
- 22.12.3-1 · all · bookworm
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · bookworm; dsa · ksmtp · debian · 12
- 22.12.3-1 · all · bookworm
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · bookworm; dsa · ksmtp · debian · 12
[libkpimsmtp-dev]Fixed
Source package: [ksmtp]
Details (2)
- 22.12.3-1 · amd64 · bookworm
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · bookworm; dsa · ksmtp · debian · 12
- 22.12.3-1 · arm64 · bookworm
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · bookworm; dsa · ksmtp · debian · 12

[Debian 13 (Trixie)]

[libkpim6smtp6]Fixed
Source package: [ksmtp]
Details (2)
- 24.12.3-1 · amd64 · trixie
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · 13
- 24.12.3-1 · arm64 · trixie
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · 13
[libksmtp-data]Fixed
Source package: [ksmtp]
Details (2)
- 24.12.3-1 · all · trixie
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · 13
- 24.12.3-1 · all · trixie
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · 13
[libksmtp-dev]Fixed
Source package: [ksmtp]
Details (2)
- 24.12.3-1 · amd64 · trixie
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · 13
- 24.12.3-1 · arm64 · trixie
  Fixed · Fixed: 21.12.3-2
  dsa · ksmtp · debian · 13

Observed: Oct 23, 2026, 6:01:43 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]