EUVD-2025-4154

Comprehensive Technical Analysis of EUVD-2025-4154

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability identified as EUVD-2025-4154 pertains to a "Missing Authentication for Critical Function" (CWE-306) in the maxprofile/accounts/routes.lua file of Q-Free MaxTime versions up to and including 2.11.0. This flaw allows an unauthenticated remote attacker to create arbitrary users, including administrators, via crafted HTTP requests.

Severity Evaluation: The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical vulnerability. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• AV:N (Network): The vulnerability is exploitable over the network.
• AC:L (Low): The attack complexity is low, meaning it is relatively easy to exploit.
• PR:N (None): No privileges are required to exploit the vulnerability.
• UI:N (None): No user interaction is required.
• S:U (Unchanged): The scope of the vulnerability does not change.
• C:H (High): Confidentiality impact is high.
• I:H (High): Integrity impact is high.
• A:H (High): Availability impact is high.

This high severity score underscores the critical nature of the vulnerability, which can lead to complete system compromise.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated HTTP Requests: An attacker can send specially crafted HTTP requests to the vulnerable endpoint to create new user accounts, including those with administrative privileges.
• Automated Scripts: Attackers can use automated scripts to exploit this vulnerability en masse, targeting multiple instances of Q-Free MaxTime.

Exploitation Methods:

• Crafted HTTP Requests: By analyzing the routes.lua file, an attacker can determine the specific HTTP requests needed to create new users.
• Brute Force Attacks: Attackers may attempt to brute force the creation of multiple user accounts to gain unauthorized access.

3. Affected Systems and Software Versions

Affected Systems:

• Q-Free MaxTime versions up to and including 2.11.0.

Software Versions:

• All versions of Q-Free MaxTime from 0 to 2.11.0 are affected.

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Upgrade to a patched version of Q-Free MaxTime that addresses this vulnerability.
• Access Control: Implement strict access controls to limit exposure of the vulnerable endpoint.
• Network Segmentation: Segment the network to isolate critical systems and reduce the attack surface.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and vulnerability assessments.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity.
• User Education: Educate users on the importance of strong passwords and the risks of unauthorized access.

5. Impact on European Cybersecurity Landscape

Regulatory Compliance:

• Organizations using Q-Free MaxTime must ensure compliance with GDPR and other relevant regulations to protect user data.
• Non-compliance can result in significant fines and legal repercussions.

Critical Infrastructure:

• If Q-Free MaxTime is used in critical infrastructure, the vulnerability poses a significant risk to national security and public safety.
• Immediate remediation is essential to prevent potential disruptions or breaches.

Public Trust:

• A breach resulting from this vulnerability can erode public trust in the affected organizations and the broader cybersecurity measures in place.

6. Technical Details for Security Professionals

Vulnerability Details:

• File: maxprofile/accounts/routes.lua
• Function: User creation endpoint
• Exploit: Unauthenticated HTTP requests to create users

Detection and Monitoring:

• Log Analysis: Monitor logs for unusual user creation activities.
• Anomaly Detection: Implement anomaly detection to identify patterns indicative of exploitation attempts.

Incident Response:

• Containment: Isolate affected systems to prevent further exploitation.
• Eradication: Remove any unauthorized user accounts created by the attacker.
• Recovery: Restore systems to a known good state and apply necessary patches.

Conclusion: The vulnerability EUVD-2025-4154 is a critical flaw that requires immediate attention. Organizations must prioritize patching and implementing robust security measures to mitigate the risk. Continuous monitoring and regular audits are essential to maintain a strong security posture and protect against future threats.