Friday, Mar 22nd, 2019
Security risk: 
Moderately Critical
Advisory ID: 
Cross Site Scripting
Versions affected: 
  • Back To Top 1.x-1.x versions prior to 1.x-1.1.2
  • Back To Top 1.x-2.x versions prior to 1.x-2.0.2

This module enables you to add a button that hovers in the bottom of your screen and allows users to smoothly scroll up the page using jQuery.

The module doesn't sufficiently sanitize the code that gets printed on pages leading to a Cross Site Scripting (XSS) issue.

This vulnerability is mitigated by the fact that an attacker must have a role with the permission "access backtotop settings".


Upgrade your site to the most recent version of Back To Top. Download available on the Back To Top 1.x releases page. See the update instructions, if needed.

Reported By: 
Coordinated By: 

Security email list

Backdrop maintains a security mailing list. Whenever a security release comes out, an email will be sent to everyone subscribed to that list, announcing the new release. Please follow the steps below to join the Security email list.

  • Log in to
  • Edit your profile
  • Scroll down to the "Email notifications" section
  • Check the box labeled "Receive security announcements for core and contrib projects"