EUVD-2025-26642

Comprehensive Technical Analysis of EUVD-2025-26642

1. Vulnerability Assessment and Severity Evaluation

The vulnerability in the XWiki Platform, identified as EUVD-2025-26642 (CVE-2025-55747), allows unauthorized access to configuration files through the webjars API. This vulnerability affects versions 6.1-milestone-2 through 16.10.6 and has been fixed in version 16.10.7.

Severity Evaluation:

• Base Score: 9.3 (CVSS 4.0)
• 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

The high base score indicates a critical vulnerability due to the following factors:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Confidentiality (VC): High (H)
• Integrity (VI): High (H)
• Availability (VA): High (H)

This vulnerability poses a significant risk as it can be exploited remotely without requiring any special privileges or user interaction, leading to high impact on confidentiality, integrity, and availability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability over the network without needing physical access to the system.
• Webjars API: The attacker can access configuration files through the webjars API, which is designed to serve web resources.

Exploitation Methods:

• Unauthorized Access: By crafting specific HTTP requests to the webjars API, an attacker can retrieve sensitive configuration files.
• Information Disclosure: The exposed configuration files may contain sensitive information such as database credentials, API keys, and other critical settings.

3. Affected Systems and Software Versions

Affected Software:

• XWiki Platform versions 6.1-milestone-2 through 16.10.6

Unaffected Software:

• XWiki Platform version 16.10.7 and later

Affected Systems:

• Any system running the vulnerable versions of the XWiki Platform, including servers hosting wiki applications built on top of it.

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade: Upgrade to XWiki Platform version 16.10.7 or later, which includes the fix for this vulnerability.
• Patch Management: Ensure that all systems are regularly updated and patched to mitigate known vulnerabilities.

Long-Term Strategies:

• Access Controls: Implement strict access controls to limit exposure of sensitive APIs and resources.
• Monitoring: Deploy monitoring tools to detect and respond to unauthorized access attempts.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and address potential security issues.

5. Impact on European Cybersecurity Landscape

The vulnerability in the XWiki Platform poses a significant risk to organizations using this software within the European Union. Given the critical nature of the vulnerability, it could lead to data breaches, unauthorized access, and potential disruption of services. This underscores the importance of timely patching and proactive security measures to protect against such threats.

6. Technical Details for Security Professionals

Vulnerability Details:

• Root Cause: The webjars API inadvertently exposes configuration files, allowing unauthorized access.
• Fix: The issue has been addressed in version 16.10.7 by implementing proper access controls and validation mechanisms for the webjars API.

References:

• GitHub Advisory: GHSA-qww7-89xh-x7m7
• GitHub Commit: 9e7b4c03f2143978d891109a17159f73d4cdd318
• Jira Issue: XWIKI-19350

ENISA IDs:

• Product: c0f38d71-f426-3951-af3a-060564a60850
• Vendor: 89cfbba9-0406-3d42-801f-c4d85842ac8c

Conclusion: This vulnerability highlights the importance of maintaining up-to-date software and implementing robust security measures to protect against potential threats. Organizations should prioritize upgrading to the patched version and review their security posture to ensure they are adequately protected.