CVE-2025-30189 Affecting dovecot package, versions <1:2.4.1+dfsg1-5ubuntu4
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UBUNTU2510-DOVECOT-13569720
- published16 Oct 2025
- disclosed31 Oct 2025
Introduced: 16 Oct 2025
NewCVE-2025-30189 (opens in a new tab)How to fix?
Upgrade Ubuntu:25.10 dovecot to version 1:2.4.1+dfsg1-5ubuntu4 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream dovecot package and not the dovecot package as distributed by Ubuntu.
See How to fix? for Ubuntu:25.10 relevant fixed versions and status.
When cache is enabled, some passdb/userdb drivers incorrectly cache all users with same cache key, causing wrong cached information to be used for these users. After cached login, all subsequent logins are for same user. Install fixed version or disable caching either globally or for the impacted passdb/userdb drivers. No publicly available exploits are known.