What is CVE-2017-18906?

CVE-2017-18906 is a high-severity vulnerability in Mattermost Server, classified under Improper Authentication. CVSS score: 8.1/10. Published 2020-06-19.

How severe is CVE-2017-18906?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Mattermost Server

CVE-2017-18906

An issue was discovered in Mattermost Server before 4.0.0, 3.10.2, and 3.9.2, when Single Sign-On OAuth2 is used. An attacker could claim somebody else's account.

Vulnerability class: Broken Authentication

EPSS: 0.008 (52.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Mattermost Mattermost_server
N/a — versions n/a

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2017-18906?: CVE-2017-18906 is a high-severity vulnerability in Mattermost Server, classified under Improper Authentication. CVSS score: 8.1/10. Published 2020-06-19.
How severe is CVE-2017-18906?: High severity. CVSS v3 base score is 8.1 out of 10.