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VulnerabilityPublished Updated

CVE-2025-30189: Open-Xchange OX Dovecot Pro · Improper Preservation of Consistency Between Independent Representations of Shared State

Affects Open-Xchange OX Dovecot ProSource CVE Database V5

0

Not known to be exploited · CVSS 7.4 High.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
7.4High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Oct 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Open-Xchange GmbH OX Dovecot ProAffected
  • =0
Fixed in–

AI-suggested

A fix is available by installing the vendor's fixed version of OX Dovecot Pro. Alternatively, disabling caching either globally or specifically for the impacted passdb/userdb drivers mitigates the issue. Since no vendor advisory or patch links are provided, confirm patch availability with the vendor.

Description

CVE-2025-30189 is a vulnerability in Open-Xchange GmbH's OX Dovecot Pro where caching mechanisms for passdb/userdb drivers incorrectly use the same cache key for multiple users. This causes cached login information to be shared across users, resulting in subsequent logins being authenticated as the same user. The issue occurs when caching is enabled. No public exploits are known. The vulnerability has a high severity with a CVSS score of 7.4.

References

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