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Fencer Vulns
medium 5.3

CVE-2025-14243 json

Mirror-registry: openshift mirror registry: user enumeration via authentication error messages

published 2026-04-08 7 mo ago modified 2026-07-25 3 mo ago also EUVD-2025-209308

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

A flaw was found in the OpenShift Mirror Registry. This vulnerability allows an unauthenticated, remote attacker to enumerate valid usernames and email addresses via different error messages during authentication failures and account creation.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-14243 updated cvss 5.3

mirror-registry: OpenShift Mirror Registry: User enumeration via authentication error messages

  • Red Hat mirror registry for Red Hat OpenShift openshift/mirror-registry-rhel8 Red Hat mirror registry for Red Hat OpenShift 2 openshift/mirror-registry-rhel8
    affected: workaround, no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

  • Red Hat mirror registry for Red Hat OpenShift
  • Red Hat mirror registry for Red Hat OpenShift 2

Classification

Weakness
  • CWE-209 Generation of Error Message Containing Sensitive Information

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.