Clickedu Under Attack: Reflected XSS Vulnerability CVE-2025-41070 Discovered

Overview

A Reflected Cross-site Scripting (XSS) vulnerability, identified as CVE-2025-41070, has been discovered in Sanoma’s Clickedu platform. This vulnerability allows an attacker to inject malicious JavaScript code into a victim’s browser by tricking them into clicking a specially crafted link. This is a client-side attack, making it crucial for Clickedu users to understand the risks and mitigation strategies.

Technical Details

The vulnerability exists in the /students/carpetes_varies.php endpoint of Clickedu. By crafting a malicious URL containing JavaScript code, an attacker can trick a user into executing this code within their browser. The application fails to properly sanitize user-supplied input, leading to the reflected XSS. The attacker can then send the user the crafted URL via email, social media, or any other communication channel. When the user clicks the link, the malicious script executes within the context of the Clickedu domain.

CVSS Analysis

Currently, the severity and CVSS score for CVE-2025-41070 are listed as N/A. This suggests the vulnerability is either newly discovered or its impact hasn’t been fully assessed yet. However, Reflected XSS vulnerabilities generally pose a significant risk and should be addressed promptly.

Possible Impact

A successful XSS attack can have severe consequences. An attacker could:

• Steal sensitive user data: Including session cookies, allowing the attacker to impersonate the user.
• Perform actions on behalf of the user: Such as changing passwords, accessing private information, or posting malicious content.
• Redirect the user to a phishing site: To steal their credentials.
• Deface the website: By modifying the content displayed to the user.

Mitigation and Patch Steps

To mitigate the risk of CVE-2025-41070, consider the following steps:

• Apply the official patch: Sanoma should release a patch for Clickedu to address this vulnerability. Apply it as soon as it becomes available.
• User Awareness Training: Educate Clickedu users about the dangers of clicking on suspicious links.
• Input Validation: Sanoma should implement robust input validation and sanitization on all user-supplied data, especially within the /students/carpetes_varies.php endpoint.
• Output Encoding: Implement proper output encoding to prevent the interpretation of user-supplied data as executable code.

References

INCIBE-CERT Advisory: Reflected Cross-Site Scripting (XSS) in Sanoma’s Clickedu