CVE-2024-6428

Name: CVE-2024-6428
Creator: NVD / NIST
Published: 2024-07-03T09:15:08.013+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.39%

Last modified Jun 17, 2026

CVE-2024-6428 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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 estimates a 0.39% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS Probability

0.39%

31.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-284

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost	>= 9.5.0, < 9.5.6
Mattermost	Mattermost	>= 9.6.0, < 9.6.3
Mattermost	Mattermost	>= 9.7.0, < 9.7.5
Mattermost	Mattermost	>= 9.8.0, < 9.8.1

References

https://mattermost.com/security-updatesVendor Advisory
https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Jul 3, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2024-6428?

How severe is CVE-2024-6428?

CVE-2024-6428 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.

How do I fix CVE-2024-6428?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-6428?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST