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Case File

CVE-2018-21255

MEDIUM · CVSS 4.3 EPSS 0.58%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-06-19 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 4.3. See the original NVD description below for full technical details.

CVE
CVE-2018-21255
Severity
MEDIUM
CVSS
4.3
EPSS
0.58%

Original NVD Description

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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-7521 MEDIUM CVE-2026-10819 MEDIUM CVE-2026-10600 MEDIUM CVE-2026-9602 MEDIUM CVE-2026-8075 MEDIUM CVE-2026-9824 MEDIUM