What is CVE-2018-21258?

CVE-2018-21258 is a high-severity vulnerability in Mattermost Server, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.5/10. Published 2020-06-19.

How severe is CVE-2018-21258?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Mattermost Server

CVE-2018-21258

An issue was discovered in Mattermost Server before 5.1. It allows attackers to cause a denial of service via the invite_people slash command.

EPSS: 0.012 (63.8th 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
N/a — versions n/a

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2018-21258?: CVE-2018-21258 is a high-severity vulnerability in Mattermost Server, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.5/10. Published 2020-06-19.
How severe is CVE-2018-21258?: High severity. CVSS v3 base score is 7.5 out of 10.