CVE-2024-36255

Name: CVE-2024-36255
Creator: NVD / NIST
Published: 2024-05-26T14:15:10.06+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.7/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2024-36255 is a medium-severity vulnerability rated 5.7/10 on the CVSS scale. Mattermost versions 9.5.x <= 9.5.3, 9.6.x <= 9.6.1 and 8.1.x <= 8.1.12 fail to perform proper input validation on post actions which allows an attacker to run a playbook checklist task command as another user via creating and sharing a deceptive post action that unexpectedly runs a slash command in some arbitrary channel.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

Mattermost versions 9.5.x <= 9.5.3, 9.6.x <= 9.6.1 and 8.1.x <= 8.1.12 fail to perform proper input validation on post actions which allows an attacker to run a playbook checklist task command as another user via creating and sharing a deceptive post action that unexpectedly runs a slash command in some arbitrary channel.

Metrics

CVSS 3.1

5.7/10

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

EPSS Probability

0.18%

8.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-352

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Server	>= 8.1.0, < 8.1.13
Mattermost	Mattermost Server	>= 9.5.0, < 9.5.4
Mattermost	Mattermost Server	>= 9.6.0, < 9.6.2

References

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

Timeline

Published: May 26, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-36255?

How severe is CVE-2024-36255?

CVE-2024-36255 has a CVSS score of 5.7/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2024-36255?

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-2024-36255?

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

Scan your code now

Source: NVD / NIST