What is CVE-2019-20887?

CVE-2019-20887 is a medium-severity vulnerability in Mattermost Server, classified under Missing Authorization. CVSS score: 4.3/10. Published 2020-06-19.

How severe is CVE-2019-20887?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Mattermost Server

CVE-2019-20887

An issue was discovered in Mattermost Server before 5.7.1, 5.6.4, 5.5.3, and 4.10.6. It does not honor flags API permissions when deciding whether a user can receive intra-team posts.

Vulnerability class: Broken Access Control

EPSS: 0.007 (47.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Mattermost Mattermost_server
N/a — versions n/a

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2019-20887?: CVE-2019-20887 is a medium-severity vulnerability in Mattermost Server, classified under Missing Authorization. CVSS score: 4.3/10. Published 2020-06-19.
How severe is CVE-2019-20887?: Medium severity. CVSS v3 base score is 4.3 out of 10.