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CVE-2025-30189

CVE-2025-30189

CVSS 7.4 HIGHEPSS 0.6%CWE-1250
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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected products
Open-Xchange GmbH · OX Dovecot Pro

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References
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.jsonhttp://seclists.org/fulldisclosure/2025/Oct/29http://www.openwall.com/lists/oss-security/2025/10/29/4