---
id: CVE-2025-30189
title: >-
  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
summary: >-
  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 ve…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-1250
published: '2025-10-31'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T21:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-30189'
references:
  - url: >-
      https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json
    label: security@open-xchange.com
  - url: 'http://seclists.org/fulldisclosure/2025/Oct/29'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2025/10/29/4'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00574
epssPercentile: 0.4565
ingestedAt: '2026-10-07T21:54:14.915Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.