CVE-2024-9155

Name: CVE-2024-9155
Creator: NVD / NIST
Published: 2024-09-26T15:15:18.06+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2024-9155 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Mattermost versions 9.10.x <= 9.10.1, 9.9.x <= 9.9.2, 9.5.x <= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

Mattermost versions 9.10.x <= 9.10.1, 9.9.x <= 9.9.2, 9.5.x <= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.25%

16.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Server	>= 9.5.0, < 9.5.9
Mattermost	Mattermost Server	>= 9.9.0, < 9.9.3
Mattermost	Mattermost Server	>= 9.10.0, < 9.10.2

References

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

Timeline

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

Frequently Asked Questions

What is CVE-2024-9155?

How severe is CVE-2024-9155?

CVE-2024-9155 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2024-9155?

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-2024-9155?

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

Scan your code now

Source: NVD / NIST