CVE-2019-20888

HIGH

Mattermost Server < 4.10.5 - Memory Leak

Title source: rule

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)

[Vendor Advisory] https://mattermost.com/security-updates/

Scores

CVSS v3 7.5

EPSS 0.0039

EPSS Percentile 59.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

CWE

CWE-401

Status published

Affected Products (7)

mattermost/mattermost_server < 4.10.5

mattermost/mattermost_server

Timeline

Published Jun 19, 2020

Tracked Since Feb 18, 2026