GHSA-H3QG-W9J5-WH3M Mattermost Server is vulnerable to XSS through lack of link relationship attributes `noreferrer` and `noopener`

An issue was discovered in Mattermost Server before 3.1.0. It allows XSS because the noreferrer and noopener protection mechanisms were not in place...

Cross-site Scripting (XSS)

Overview github.com/mattermost/mattermost-server is an open source Slack-alternative in Golang and React. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the lack of noreferrer and noopener link relationship attributes. An attacker can execute arbitrary scripts in...