CyberSecBulletin
CVE-2025-30189NVD status: Deferred

OX Dovecot Pro: Improper Preservation of Consistency Between Independent Representations of Shared State

Published Updated By the CyberSecBulletin desk

CVE-2025-30189 is a high-severity improper preservation of consistency between independent representations of shared state vulnerability in OX Dovecot Pro from Open-Xchange, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected OX Dovecot Pro versions: 3.1.0 and earlier; 2.4.0 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.57% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of OX Dovecot Pro you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on documentation.open-xchange.com for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
Open-XchangeOX Dovecot Pro3.1.0 and earlier; 2.4.0 and earlierNot stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by CNA (open-xchange.com).

Official 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.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Preservation of Consistency Between Independent Representations of Shared State

The product has or supports multiple distributed components or sub-systems that are each required to keep their own local copy of shared data - such as state or cache - but the product does not ensure that all local copies remain consistent with each other.

More Improper Preservation of Consistency Between Independent Representations of Shared State vulnerabilities (CWE-1250)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in OX Dovecot Pro

All OX Dovecot Pro vulnerabilities

Spotted an error? Tell us.