GitHub Advisoryadvisory · Go

GHSA-jc6w-8r7f-vmp5 Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names

HIGH Published 2022-05-24 Modified 2025-12-03 Official page ↗
Aliases
CVE-2017-18871
Ecosystem
Go
Packages
github.com/mattermost/mattermost-server
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-248
Reviewed
2025-12-03

Affected packages

• Go github.com/mattermost/mattermost-server: < 4.2.2 → fixed in 4.2.2 • Go github.com/mattermost/mattermost-server: >= 4.3.0-rc1, < 4.3.4 → fixed in 4.3.4 • Go github.com/mattermost/mattermost-server: >= 4.4.0-rc1, < 4.4.5 → fixed in 4.4.5 • Go github.com/mattermost/mattermost-server: >= 4.5.0-rc1, < 4.5.0 → fixed in 4.5.0

Description

An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an @ character before a JavaScript field name.

Related

Alias · CVE (1)

  • CVE-2017-18871 An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. vulnerability

Weakness · CWE (1)

  • CWE-248 Uncaught Exception weakness

References