Amazon Linux AMI Security Advisory: ALAS-2018-985
Advisory Release Date: 2018-04-05 23:13 Pacific
Cross-site scripting (XSS) vulnerability in web UI
A cross-site scripting (XSS) flaw was found in mailman. An attacker, able to trick the user into visiting a specific URL, can execute arbitrary web scripts on the user's side and force the victim to perform unintended actions. (CVE-2018-5950 )
CSRF protection missing in the user options page
Cross-site request forgery (CSRF) vulnerability in the user options page in GNU Mailman 2.1.x before 2.1.23 allows remote attackers to hijack the authentication of arbitrary users for requests that modify an option, as demonstrated by gaining access to the credentials of a victim's account. (CVE-2016-6893 )
Run yum update mailman to update your system.