Vulnerability Description
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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxd
- http://seclists.org/fulldisclosure/2025/Oct/29
- http://www.openwall.com/lists/oss-security/2025/10/29/4
FAQ
What is CVE-2025-30189?
CVE-2025-30189 is a vulnerability with a CVSS score of 7.4 (HIGH). 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 login...
How severe is CVE-2025-30189?
CVE-2025-30189 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-30189?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.