Input validation error in Mattermost Server - CVE-2018-21259

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Main Vulnerability Database Vulnerabilities #VU30228

Input validation error in Mattermost Server - CVE-2018-21259

Published: June 19, 2020 / Updated: July 17, 2020


Vulnerability identifier: #VU30228
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-21259
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Mattermost Server
Software vendor:
Mattermost, Inc.

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

An issue was discovered in Mattermost Server before 4.10.1, 4.9.4, and 4.8.2. It allows attackers to cause a denial of service (application hang) via a malformed link in a channel.


Remediation

Install update from vendor's website.

External links