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Fencer Vulns
high 7.4

CVE-2025-30189 json

When cache is enabled, some passdb/userdb drivers incorrectly cache all users with same cache key, causing wrong cached information to be u…

published 2025-10-31 12 mo ago modified 2026-10-07 32 d ago also EUVD-2025-37318

cvss
7.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

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 version or disable caching either globally or for the impacted passdb/userdb drivers. No publicly available exploits are known.

Patch / fix

  • dovecot dovecot 2.4.2
  • open-xchange dovecot 2.4.2
  • dovecot Debian 13 1:2.4.1+dfsg1-6+deb13u1
  • dovecot Debian 14 1:2.4.1+dfsg1-7

debian advisories DEBIAN-CVE-2025-30189

  • dovecot Ubuntu 25.10 1:2.4.1+dfsg1-5ubuntu4

ubuntu advisories UBUNTU-CVE-2025-30189

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • dovecot24 SLES for SAP applications 16.0, SLES 16.0 2.4.2-160000.1.1

suse advisories SUSE-SU-2025:21159-1

  • dovecot24 openSUSE Leap 16.0 2.4.2-160000.1.1
  • dovecot24 openSUSE Tumbleweed 2.4.2-1.1

opensuse advisories openSUSE-SU-2025:20113-1openSUSE-SU-2025:15676-1

  • dovecot Alpine 3.24, Alpine 3.23 2.4.2-r0

alpine advisories ALPINE-CVE-2025-30189

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
12 mo ago

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.4 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

Classification

Weakness
  • CWE-1250 Improper Preservation of Consistency Between Independent Representations of Shared State

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.