MODX Revolution 2.x before 2.2.15 does not include the HTTPOnly flag in a Set-Cookie header for the session cookie, which makes it easier for remote attackers to obtain potentially sensitive information via script access to this cookie.
Cross-site scripting (XSS) vulnerability in manager/index.php in MODX Revolution 2.x before 2.2.15 allows remote attackers to inject arbitrary web script or HTML via the context_key parameter.
MODX Revolution 2.x before 2.2.15 allows remote attackers to bypass the cross-site request forgery (CSRF) protection mechanism by (1) omitting the CSRF token or via a (2) long string in the CSRF token parameter.