Global infos:

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.

CVE Status: Awaiting Analysis

References:

[email protected]

Metrics:

Attribute	Value
Attack Complexity	LOW
Attack Vector	NETWORK
Availability Impact	HIGH
Base Score	6.5
Base Severity	MEDIUM
Confidentiality Impact	NONE
Integrity Impact	NONE
Privileges Required	LOW
Scope	UNCHANGED
User Interaction	NONE
Vector String	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability Score	2.8
Impact Score	3.6
Source	[email protected]
Type	Secondary

Links:

Exploit-db
Github