Vulnerability in Mattermost Server

CVE-2019-20871

An issue was discovered in Mattermost Server before 5.9.0, 5.8.1, 5.7.3, and 4.10.8. The Markdown library allows catastrophic backtracking.

EPSS: 0.011 (62.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Mattermost Mattermost_server — versions 5.9.0
N/a — versions n/a

References

cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2019-20871?: CVE-2019-20871 is a high-severity vulnerability in Mattermost Server. CVSS score: 7.5/10. Published 2020-06-19.
How severe is CVE-2019-20871?: High severity. CVSS v3 base score is 7.5 out of 10.