What is CVE-2018-21255?

CVE-2018-21255 is a medium-severity vulnerability in Mattermost Server, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 4.3/10. Published 2020-06-19.

How severe is CVE-2018-21255?

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

Vulnerability in Mattermost Server

CVE-2018-21255

An issue was discovered in Mattermost Server before 5.1. Non-members of a channel could use the Channel PATCH API to modify that channel.

EPSS: 0.006 (44.3th 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:N/I:L/A:N.

Affected products

Mattermost Mattermost_server
N/a — versions n/a

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2018-21255?: CVE-2018-21255 is a medium-severity vulnerability in Mattermost Server, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 4.3/10. Published 2020-06-19.
How severe is CVE-2018-21255?: Medium severity. CVSS v3 base score is 4.3 out of 10.