CVE-2019-20888

HIGH

Mattermost Server < 5.7 - Denial of Service via Outgoing Webhook or Slash Command Integration

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References
Vendor Advisory x_refsource_confirm
https://mattermost.com/security-updates/

Scores

CVSS v3 7.5
EPSS 0.0039
EPSS Percentile 60.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-401
Status published
Products (2)
mattermost/mattermost_server 5.7.0 rc1 (6 CPE variants)
mattermost/mattermost_server < 4.10.5
Published Jun 19, 2020
Tracked Since Feb 18, 2026