Memory leak in Mattermost Server - CVE-2019-20888
Published: June 19, 2020 / Updated: July 17, 2020
Vulnerability identifier: #VU30239
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-20888
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
An issue was discovered in Mattermost Server before 5.7, 5.6.3, 5.5.2, and 4.10.5. It allows attackers to cause a denial of service (memory consumption) via an outgoing webhook or a slash command integration.
Affected software
Mattermost Server
How to mitigate CVE-2019-20888
Install update from vendor's website.
Mattermost Server - update to 5.6.3