Input validation error in Mattermost Server - CVE-2017-18889
Published: June 19, 2020 / Updated: July 17, 2020
Vulnerability identifier: #VU30201
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-18889
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote authenticated user to manipulate data.
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. An attacker could create fictive system-message posts via webhooks and slash commands, in the v3 or v4 REST API.
Affected software
Mattermost Server
How to mitigate CVE-2017-18889
Install update from vendor's website.
Mattermost Server - update to 4.2.1