What is CVE-2024-6428?

CVE-2024-6428 is a medium-severity vulnerability in Mattermost, classified under Improper Access Control. CVSS score: 5.3/10. Published 2024-07-03.

How severe is CVE-2024-6428?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2024-6428 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Mattermost

CVE-2024-6428

Mattermost versions 9.8.0, 9.7.x <= 9.7.4, 9.6.x <= 9.6.2, 9.5.x <= 9.5.5 fail to prevent specifying a RemoteId when creating a new user which allows an attacker to specify both a remoteId and the user ID, resulting in creating a user with a user-defined user ID. This can cause some broken functionality in User Management such administrative actions against the user not working.

EPSS: 0.004 (32.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Mattermost — versions 9.8.0, 9.7.0, 9.6.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

responsibledisclosure@mattermost.com (Vendor Advisory)

Frequently asked questions

What is CVE-2024-6428?: CVE-2024-6428 is a medium-severity vulnerability in Mattermost, classified under Improper Access Control. CVSS score: 5.3/10. Published 2024-07-03.
How severe is CVE-2024-6428?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2024-6428 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.