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CVE-2017-18872 Moderate

Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization in github.com/mattermost/mattermost-server

Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization in github.com/mattermost/mattermost-server

Exploit probability 0.6%
Published October 30, 2025
Required by Not available
Last source change March 3, 2026

02 / AFFECTED SOFTWARE

Affected packages

Unknown Unknown

19 explicit affected versions

Go github.com/mattermost/mattermost-server
Go github.com/mattermost/mattermost-server

03 / CONNECTIONS

Connected vulnerabilities

related OPENSUSE-SU-2026:21483-1

04 / EVIDENCE

Source records

Open Source Vulnerabilities CVE-2017-18872

An issue was discovered in Mattermost Server before 4.4.3 and 4.3.3. Attackers could reconfigure an OAuth app in some cases where Mattermost is an OAuth 2.0 service provider.

View original source
Open Source Vulnerabilities GO-2025-4075

Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization in github.com/mattermost/mattermost-server

View original source
Open Source Vulnerabilities GHSA-hgrp-fgm8-56g8

An issue was discovered in Mattermost Server before 4.4.3 and 4.3.3. Attackers could reconfigure an OAuth app in some cases where Mattermost is an OAuth 2.0 service provider.

View original source

05 / REFERENCES

Further evidence