CVE-2019-20880

HIGH

Mattermost Server < 5.8.0, < 5.7.2, < 5.6.5, < 4.10.7 - Denial of Service via OpenGraph

Title source: llm
STIX 2.1

Description

An issue was discovered in Mattermost Server before 5.8.0, 5.7.2, 5.6.5, and 4.10.7. It allows attackers to cause a denial of service (memory consumption) via OpenGraph.

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-770
Status published
Products (2)
mattermost/mattermost_server 5.8.0 rc1 (4 CPE variants)
mattermost/mattermost_server < 4.10.7
Published Jun 19, 2020
Tracked Since Feb 18, 2026