Plane is an open-source project management tool. Prior to 1.4.0, the plane comments fail to sanitize unsafe URL schemes stored in comment_html. A project member can store a crafted link in a comment, and attacker-controlled script executes in the browser context of another user who selects the link. This issue is fixed in version 1.4.0.
Improper Neutralization of Input During Web Page Generation The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.