Medium severity · published May 26, 2024
CVE-2024-36255
Post actions can run playbook checklist task commands
5.7
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
9.5.0 through 9.5.3; 9.6.0 through 9.6.1; 8.1.0 through 8.1.12 · source: vendor, CISA
MS
Mattermost Server · Mattermost
8.1.0 before 8.1.13; 9.5.0 before 9.5.4; 9.6.0 before 9.6.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-36255
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-36255
Vendor Advisory
https://mattermost.com/security-updates
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