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Synthesis of the vulnerability 
An attacker can trigger a Cross Site Scripting of Drupal Back To Top, in order to run JavaScript code in the context of the web site.
 Vulnerable products: Drupal Modules ~ not comprehensive.
Severity of this weakness: 2/4.
Creation date: 20/03/2019.
Références of this bulletin: DRUPAL-SA-CONTRIB-2019-040, VIGILANCE-VUL-28788.
Description of the vulnerability 
The Back To Top module can be installed on Drupal.
However, it does not filter received data before inserting them in generated HTML documents.
An attacker can therefore trigger a Cross Site Scripting of Drupal Back To Top, in order to run JavaScript code in the context of the web site.
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This cybersecurity note impacts software or systems such as Drupal Modules ~ not comprehensive.
Our Vigil@nce team determined that the severity of this computer weakness announce is medium.
The trust level is of type confirmed by the editor, with an origin of document.
An attacker with a expert ability can exploit this cybersecurity vulnerability.
Solutions for this threat 
Drupal Back To Top: version 7.x-1.6.
The version 7.x-1.6 is fixed:
https://www.drupal.org/project/back_to_top
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Computer vulnerabilities tracking service 
Vigil@nce provides network vulnerability announces. The Vigil@nce security watch publishes vulnerability bulletins about threats impacting the information system.
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