Arbitrary Command Injection The advisory has been revoked - it doesn't affect any version of package kmailtransport (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1804-KMAILTRANSPORT-10873287
- published22 Jul 2025
- disclosed10 Aug 2021
Introduced: 10 Aug 2021
CVE-2021-38373 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:18.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kmailtransport package and not the kmailtransport package as distributed by Ubuntu.
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.