Silverstripe silverstripe/assets through 1.10.0 allows XSS. Draft protected images can be published by changing an existing image shortcode on website content to match the ID of the draft protected image and then publishing the website content.
CWE-287 - Improper Authentication
Improper (or broken) authentication attacks are widespread, and have accounted for many of the worst data breaches in recent years. Improper authentication attacks are a class of vulnerabilities where an attacker impersonates a legitimate user by exploiting weaknesses in either session management or credential management to gain access to the user’s account. This can result in disclosure of sensitive information, and can lead to system compromise, theft, identity theft, and fraud.