EUVD-2025-30896

Comprehensive Technical Analysis of EUVD-2025-30896

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-30896 pertains to a Stored Cross-Site Scripting (XSS) issue in the Prompt module of DNN (DotNetNuke) Platform. The CVSS (Common Vulnerability Scoring System) base score of 9.1 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability can be exploited remotely over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
• Privileges Required (PR): Low (L) - The attacker needs low-level privileges to exploit the vulnerability.
• User Interaction (UI): Required (R) - The attack requires some form of user interaction.
• Scope (S): Changed (C) - The vulnerability affects a different security scope.
• Confidentiality (C): High (H) - The vulnerability results in a high impact on confidentiality.
• Integrity (I): High (H) - The vulnerability results in a high impact on integrity.
• Availability (A): High (H) - The vulnerability results in a high impact on availability.

This high severity score underscores the critical nature of the vulnerability, necessitating immediate attention and mitigation.

2. Potential Attack Vectors and Exploitation Methods

Stored XSS vulnerabilities allow an attacker to inject malicious scripts into web applications. These scripts are stored on the target server and executed by users who view the affected content. Potential attack vectors include:

• Malicious Input Submission: An attacker submits malicious scripts through input fields in the Prompt module.
• Phishing Attacks: The injected scripts can redirect users to malicious sites or capture sensitive information.
• Session Hijacking: The attacker can steal session cookies to impersonate users.
• Data Theft: The scripts can exfiltrate sensitive data from the user's browser.

3. Affected Systems and Software Versions

The vulnerability affects DNN Platform versions prior to 10.1.0. Organizations using these versions are at risk and should prioritize updating to the latest version.

4. Recommended Mitigation Strategies

To mitigate the risk associated with this vulnerability, the following strategies are recommended:

• Immediate Patching: Upgrade to DNN Platform version 10.1.0 or later, which includes the security fix for this vulnerability.
• Input Validation: Implement robust input validation and sanitization to prevent malicious scripts from being stored.
• Content Security Policy (CSP): Deploy a strong CSP to mitigate the impact of XSS attacks by restricting the execution of unauthorized scripts.
• Regular Security Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security issues.
• User Education: Educate users about the risks of XSS and the importance of not clicking on suspicious links or submitting sensitive information to untrusted sources.

5. Impact on European Cybersecurity Landscape

The European cybersecurity landscape is highly interconnected, and vulnerabilities in widely-used platforms like DNN can have far-reaching consequences. The impact includes:

• Data Breaches: Sensitive data of European users and organizations could be compromised.
• Regulatory Compliance: Organizations may face penalties under GDPR for failing to protect user data.
• Reputation Damage: Companies affected by this vulnerability may suffer reputational damage.
• Operational Disruption: The high impact on availability could lead to significant operational disruptions.

6. Technical Details for Security Professionals

For security professionals, the following technical details are pertinent:

• Vulnerability Identification: The vulnerability is identified by CVE-2025-59545 and GHSA-2qxc-mf4x-wr29.
• References:
  • GitHub Security Advisory
  • DNN Platform GitHub Repository
  • NVD Detail
• Assigner: GitHub_M
• ENISA ID Product: Dnn.Platform versions < 10.1.0
• ENISA ID Vendor: DNNSoftware

Security professionals should review the provided references for detailed technical information and guidance on remediation. Regular monitoring of security advisories and prompt application of patches are crucial for maintaining a secure environment.

Conclusion

The Stored XSS vulnerability in the DNN Platform's Prompt module is a critical issue that requires immediate attention. Organizations should prioritize updating to the latest version of DNN Platform and implement additional security measures to mitigate the risk. The potential impact on European cybersecurity underscores the importance of proactive security management and compliance with regulatory standards.