CVE-2024-36255 - CVE House
Back to Database
Status published Medium CVE-2024-36255

Post actions can run playbook checklist task commands

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2024-36255

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Juho Nurminen

References

More from Mattermost

View All →
CVE-2025-9084
Open redirect in OAuth login
Low 3.1
CVE-2025-9081
IDOR in board file download allows any user to download any file by UUID
Low 3.1
CVE-2025-9079
Admin RCE via prepackaged plugins by way of misconfigured imports directory
High 8
CVE-2025-9078
Weak cache keys lead to post IDOR and link preview poisoning
Medium 4.3
CVE-2025-9076
Mattermost Server exposes sensitive user credentials during shared channel membership synchronization
Medium 6.5

Affected Vendor

Affected Software

Mattermost
Vulnerable Versions:
9.5.0, 9.6.0, 8.1.0, 9.7.0, 9.5.4, 9.6.2, 8.1.13

Timeline

Official Publish: May 26th, 2024
Last Modified: August 2nd, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

Weaknesses (CWE)

CWE-352

MITRE ATT&CK TTPs

T1566.002 Spearphishing Link
Initial Access
T1204.001 Malicious Link
Execution
T1098 Account Manipulation
Persistence
T1565.001 Stored Data Manipulation
Impact