Drupal Block Class Module 'Class' Field HTML Injection Vulnerability

The Block Class module for Drupal is prone to an HTML-injection vulnerability because it fails to properly sanitize user-supplied input before using it in dynamically generated content.

Successful exploits will allow attacker-supplied HTML and script code to run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or control how the site is rendered to the user. Other attacks are also possible.

Versions prior to Block Class 7.x-1.0 are vulnerable.


 

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