EUVD-2025-22261

Comprehensive Technical Analysis of EUVD-2025-22261

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability affects HAXcms with a NodeJS backend, specifically versions 11.0.6 and below. The default configuration for these versions is insecure, designed for local development, and lacks proper authorization and authentication checks. The configuration setting HAXCMS_DISABLE_JWT_CHECKS is set to true, which disables session authentication.

Severity Evaluation: The Base Score of 9.3 (CVSS:4.0) indicates a critical vulnerability. The vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N highlights the following:

• Attack Vector (AV:N): Network-based attack.
• Attack Complexity (AC:L): Low complexity required to exploit.
• Authentication (AT:N): No authentication required.
• Privileges Required (PR:N): No privileges required.
• User Interaction (UI:N): No user interaction required.
• Confidentiality Impact (VC:H): High impact on confidentiality.
• Integrity Impact (VI:H): High impact on integrity.
• Availability Impact (VA:H): High impact on availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Access: An attacker can exploit the vulnerability to gain unauthorized access to the HAXcms instance without needing any credentials.
• Data Exfiltration: The lack of authentication checks can allow attackers to exfiltrate sensitive data.
• Unauthorized Operations: Attackers can perform unauthorized operations, such as modifying content, deleting data, or injecting malicious code.

Exploitation Methods:

• Network Scanning: Attackers can scan for HAXcms instances running vulnerable versions.
• Direct Access: Once identified, attackers can directly access the HAXcms instance without authentication.
• Automated Scripts: Attackers can use automated scripts to exploit the vulnerability en masse.

3. Affected Systems and Software Versions

Affected Systems:

• All HAXcms instances with a NodeJS backend running versions 11.0.6 and below.

Software Versions:

• HAXcms NodeJS backend versions 11.0.6 and below.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Upgrade: Upgrade to HAXcms version 11.0.7 or later, which includes the fix for this vulnerability.
• Configuration Check: Ensure that the HAXCMS_DISABLE_JWT_CHECKS setting is set to false in the configuration.

Long-Term Mitigation:

• Regular Audits: Conduct regular security audits to identify and mitigate similar vulnerabilities.
• Secure Configuration: Use secure configuration practices and avoid using default settings designed for development in production environments.
• Monitoring: Implement monitoring and alerting for unauthorized access attempts.

5. Impact on European Cybersecurity Landscape

Potential Impact:

• Data Breaches: Organizations using vulnerable versions of HAXcms could face data breaches, leading to the exposure of sensitive information.
• Service Disruption: Unauthorized access could result in service disruptions, affecting the availability of web services.
• Reputation Damage: Organizations could suffer reputational damage due to security incidents.

Regulatory Compliance:

• GDPR: Organizations must ensure compliance with GDPR regulations, which mandate the protection of personal data.
• NIS Directive: Critical infrastructure providers must adhere to the Network and Information Systems (NIS) Directive, ensuring robust cybersecurity measures.

6. Technical Details for Security Professionals

Vulnerability Details:

• Configuration Setting: The HAXCMS_DISABLE_JWT_CHECKS setting is set to true by default in vulnerable versions.
• Authentication Mechanism: The vulnerability bypasses JWT (JSON Web Token) checks, allowing unauthenticated access.

Detection Methods:

• Configuration Review: Review the configuration files for the HAXCMS_DISABLE_JWT_CHECKS setting.
• Log Analysis: Analyze logs for unauthorized access attempts and unusual activities.
• Network Traffic: Monitor network traffic for suspicious activities targeting HAXcms instances.

Remediation Steps:

1. Update Software: Ensure all HAXcms instances are updated to version 11.0.7 or later.
2. Secure Configuration: Modify the configuration to set HAXCMS_DISABLE_JWT_CHECKS to false.
3. Access Controls: Implement robust access controls and authentication mechanisms.
4. Incident Response: Develop and implement an incident response plan to address potential breaches.

References:

• GitHub Advisory: GHSA-f38f-jvqj-mfg6
• CVE ID: CVE-2025-54127

By following these recommendations, organizations can mitigate the risks associated with this vulnerability and enhance their overall cybersecurity posture.