Description
A server-side request forgery vulnerability exists in Jenkins Mattermost Notification Plugin 2.6.2 and earlier in MattermostNotifier.java that allows attackers with Overall/Read permission to have Jenkins connect to an attacker-specified Mattermost server and room and send a message.
Remediation
References
http://www.securityfocus.com/bid/107295
https://jenkins.io/security/advisory/2019-02-19/#SECURITY-985