What is CVE-2017-18889?

CVE-2017-18889 is a medium-severity vulnerability in Mattermost Server, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2020-06-19.

How severe is CVE-2017-18889?

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

Improper input validation in Mattermost Server

CVE-2017-18889

An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. An attacker could create fictive system-message posts via webhooks and slash commands, in the v3 or v4 REST API.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.007 (48.0th 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 — versions 4.3.0
N/a — versions n/a

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2017-18889?: CVE-2017-18889 is a medium-severity vulnerability in Mattermost Server, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2020-06-19.
How severe is CVE-2017-18889?: Medium severity. CVSS v3 base score is 4.3 out of 10.