Simple Klaro - Moderately critical - Cross Site Scripting - SA-CONTRIB-2025-073

Project: Simple KlaroDate: 2025-May-28Security risk: Moderately critical 13 ∕ 25 AC:Complex/A:User/CI:Some/II:Some/E:Theoretical/TD:AllVulnerability: Cross Site ScriptingAffected versions: <1.10.0CVE IDs: CVE-2025-48919Description: The "Simple Klaro" module adds the "Klaro! A Simple Consent Manager" to your website and allows you to configure it according to your needs in the Drupal backend.
The module doesn't sufficiently sanitise data attributes allowing persistent Cross Site Scripting (XSS) attacks.
This vulnerability is mitigated by the fact that an attacker must have a role with permission to enter HTML tags containing specific data attributes.Solution: Install the latest version:

• If you use the "Simple Klaro" module for Drupal 9.x/10.x/11.x, upgrade to Simple Klaro 1.10.0

Reported By: 

• Pierre Rudloff (prudloff)

Fixed By: 

• Norman Kämper-Leymann (norman.lol)

Coordinated By: 

• Juraj Nemec (poker10) of the Drupal Security Team
• Pierre Rudloff (prudloff)
• Cathy Theys (yesct) of the Drupal Security Team