CVE-2025-55729

Comprehensive Technical Analysis of CVE-2025-55729

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-55729 CVSS Score: 10

The vulnerability in XWiki Remote Macros, specifically in the ConfluenceLayoutSection macro, allows for remote code execution (RCE) due to missing escaping of the ac:type parameter. This flaw enables XWiki syntax injection, which can be exploited by any user with edit permissions on any page. The severity of this vulnerability is critical, as indicated by the CVSS score of 10, the highest possible score. This score reflects the potential for complete system compromise, including unauthorized access, data breaches, and service disruptions.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Users: If the XWiki instance allows anonymous editing, unauthenticated users can exploit this vulnerability.
• Authenticated Users: Any user with edit permissions can inject malicious XWiki syntax, leading to RCE.

Exploitation Methods:

• Syntax Injection: An attacker can inject malicious XWiki syntax into the ac:type parameter of the ConfluenceLayoutSection macro.
• Payload Delivery: The injected syntax can include scripts or commands that execute arbitrary code on the server.
• Persistent Exploitation: Once injected, the malicious code can persist and execute every time the affected page is rendered, potentially leading to long-term compromise.

3. Affected Systems and Software Versions

Affected Versions:

• XWiki Remote Macros versions starting from 1.0 up to and including 1.26.4.

Fixed Version:

• Version 1.26.5 addresses the vulnerability by properly escaping the ac:type parameter.

Affected Systems:

• Any system running the vulnerable versions of XWiki Remote Macros, particularly those with user-generated content or migrated content from Confluence.

4. Recommended Mitigation Strategies

Immediate Actions:

• Upgrade: Immediately upgrade to XWiki Remote Macros version 1.26.5 or later.
• Access Control: Restrict edit permissions to trusted users only.
• Monitoring: Implement monitoring for suspicious activities, such as unusual edits or script executions.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.
• User Education: Educate users about the risks of injecting untrusted content and the importance of secure coding practices.
• Patch Management: Establish a robust patch management process to ensure timely updates and patches.

5. Impact on Cybersecurity Landscape

The discovery and exploitation of CVE-2025-55729 highlight the ongoing challenges in securing content management systems (CMS) and collaborative platforms. The vulnerability underscores the importance of:

• Input Validation: Ensuring all user inputs are properly validated and escaped.
• Secure Coding Practices: Adhering to secure coding guidelines to prevent injection attacks.
• Third-Party Risks: Managing risks associated with third-party plugins and extensions.

This vulnerability serves as a reminder for organizations to prioritize security in their software development lifecycle (SDLC) and to maintain vigilance against emerging threats.

6. Technical Details for Security Professionals

Vulnerability Details:

• Root Cause: The ac:type parameter in the ConfluenceLayoutSection macro is used without proper escaping, allowing XWiki syntax injection.
• Exploitation: An attacker can inject malicious XWiki syntax into the ac:type parameter, leading to RCE.

Code Analysis:

• Vulnerable Code: The issue is located in the ConfluenceLayoutSection.xml file, specifically around line 518.
• Fix: The fix involves ensuring that the ac:type parameter is properly escaped before being used in XWiki syntax.

References:

• GitHub Commit
• GitHub Security Advisory
• Jira Issue

Conclusion: CVE-2025-55729 is a critical vulnerability that requires immediate attention. Organizations using XWiki Remote Macros should prioritize upgrading to the patched version and implement robust security measures to mitigate similar risks in the future. The cybersecurity community should continue to emphasize the importance of secure coding practices and regular security audits to protect against such vulnerabilities.