CVE-2023-6459

Name: CVE-2023-6459
Creator: NVD / NIST
Published: 2023-12-06T09:15:09.14+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2023-6459 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Mattermost is grouping calls in the /metrics endpoint by id and reports that id in the response. Since this id is the channelID, the public /metrics endpoint is revealing channelIDs. . EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

Mattermost is grouping calls in the /metrics endpoint by id and reports that id in the response. Since this id is the channelID, the public /metrics endpoint is revealing channelIDs.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.53%

40.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Server	< 7.8.14
Mattermost	Mattermost Server	>= 8.0.0, < 8.1.5

References

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

Timeline

Published: Dec 6, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-6459?

Mattermost is grouping calls in the /metrics endpoint by id and reports that id in the response. Since this id is the channelID, the public /metrics endpoint is revealing channelIDs.

How severe is CVE-2023-6459?

CVE-2023-6459 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2023-6459?

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-2023-6459?

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

Scan your code now

Source: NVD / NIST