CVE-2018-21258: mattermost mattermost_server Injection

Vulnerability summary

CVE-2018-21258 is a high (CVSS 7.5) Injection vulnerability in mattermost mattermost_server. EPSS estimates a 1.17% chance of exploitation in the next 30 days, higher than 66.7% of scored vulnerabilities.

Timeline

1. 19-06-2020
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

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.

• CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.