EUVD-2025-26282

Comprehensive Technical Analysis of EUVD-2025-26282

1. Vulnerability Assessment and Severity Evaluation

The vulnerability EUVD-2025-26282, also known as CVE-2025-31100, is classified as an "Unrestricted Upload of File with Dangerous Type" in the Mojoomla School Management plugin. This vulnerability allows an attacker to upload a web shell to a web server, which can lead to remote code execution (RCE). The CVSS (Common Vulnerability Scoring System) base score of 9.9 indicates a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H breaks down as follows:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - The attack requires minimal complexity.
• Privileges Required (PR): Low (L) - The attacker needs low-level privileges.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Changed (C) - The vulnerability affects a different security scope.
• Confidentiality (C): High (H) - Complete loss of confidentiality.
• Integrity (I): High (H) - Complete loss of integrity.
• Availability (A): High (H) - Complete loss of availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves exploiting the unrestricted file upload functionality in the Mojoomla School Management plugin. An attacker could:

1. Identify the Vulnerable Endpoint: Locate the file upload endpoint in the plugin.
2. Upload a Web Shell: Craft a malicious file (e.g., a PHP web shell) and upload it through the vulnerable endpoint.
3. Execute Arbitrary Code: Once the web shell is uploaded, the attacker can execute arbitrary commands on the server, leading to full control over the system.

3. Affected Systems and Software Versions

The vulnerability affects the Mojoomla School Management plugin versions from n/a through 1.93.1, released on 02-07-2025. Organizations using this plugin within the specified version range are at risk.

4. Recommended Mitigation Strategies

1. Immediate Patching: Upgrade to a patched version of the Mojoomla School Management plugin as soon as it becomes available.
2. Input Validation: Implement strict input validation and file type checks to prevent the upload of dangerous file types.
3. Web Application Firewall (WAF): Deploy a WAF to monitor and block suspicious file uploads.
4. Regular Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.
5. Least Privilege Principle: Ensure that the web server and application run with the least privileges necessary to minimize the impact of a successful exploit.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to educational institutions and organizations using the Mojoomla School Management plugin within the European Union. Successful exploitation could lead to data breaches, unauthorized access, and potential disruption of educational services. Given the critical nature of the vulnerability, it underscores the need for robust cybersecurity measures and timely patch management practices across the EU.

6. Technical Details for Security Professionals

• Vulnerability Type: Unrestricted File Upload
• Affected Component: Mojoomla School Management plugin
• Exploitability: High, due to low attack complexity and network-based attack vector
• Mitigation: Patching, input validation, WAF deployment, and regular security audits
• Detection: Monitor for unusual file uploads and suspicious server activity
• Response: Isolate affected systems, apply patches, and review logs for signs of compromise

Conclusion

EUVD-2025-26282 represents a critical vulnerability that requires immediate attention from cybersecurity professionals. Organizations using the affected Mojoomla School Management plugin should prioritize patching and implement robust security measures to mitigate the risk of exploitation. The European cybersecurity landscape must remain vigilant against such vulnerabilities to protect sensitive data and ensure the continuity of educational services.