EUVD-2025-198317

Comprehensive Technical Analysis of EUVD-2025-198317

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-198317 affects the md-to-pdf CLI tool, which converts Markdown files to PDF using Node.js and headless Chrome. The issue arises from the improper handling of JavaScript delimiters within Markdown front-matter blocks, leading to arbitrary code execution. This vulnerability is classified with a CVSS Base Score of 10.0, indicating a critical severity level. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H underscores the following characteristics:

• Attack Vector (AV:N): Network-based attack.
• Attack Complexity (AC:L): Low complexity required for exploitation.
• Privileges Required (PR:N): No privileges are required.
• User Interaction (UI:N): No user interaction is needed.
• Scope (S:C): The vulnerability affects components beyond its security scope.
• Confidentiality (C:H): High impact on confidentiality.
• Integrity (I:H): High impact on integrity.
• Availability (A:H): High impact on availability.

2. Potential Attack Vectors and Exploitation Methods

The primary attack vector involves embedding malicious JavaScript code within the front-matter block of a Markdown file. When the md-to-pdf tool processes this file, the embedded JavaScript is executed by the underlying Node.js engine, leading to remote code execution (RCE).

Exploitation Methods:

• Crafted Markdown Files: An attacker could craft a Markdown file with a front-matter block containing JavaScript code designed to execute arbitrary commands on the target system.
• Supply Chain Attacks: If the md-to-pdf tool is used in automated workflows or CI/CD pipelines, an attacker could inject malicious Markdown files into the pipeline to compromise the build environment.

3. Affected Systems and Software Versions

The vulnerability affects all versions of the md-to-pdf tool prior to version 5.2.5. Systems and environments that use this tool for converting Markdown files to PDF are at risk, including:

• Development Environments: Developers using the tool for documentation or report generation.
• CI/CD Pipelines: Automated build and deployment systems that process Markdown files.
• Content Management Systems: Platforms that integrate md-to-pdf for content conversion.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update to Version 5.2.5: Upgrade the md-to-pdf tool to version 5.2.5 or later, which includes the patch for this vulnerability.
• Input Validation: Implement strict input validation and sanitization for Markdown files to prevent the inclusion of malicious front-matter blocks.
• Least Privilege: Run the md-to-pdf tool with the least privileges necessary to minimize the impact of potential exploitation.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits of third-party libraries and tools used in the development and deployment processes.
• Security Training: Educate developers and DevOps teams about the risks associated with processing untrusted input and the importance of secure coding practices.
• Monitoring and Logging: Implement robust monitoring and logging to detect and respond to any suspicious activities related to the md-to-pdf tool.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to organizations within the European Union that rely on the md-to-pdf tool for document conversion. The potential for remote code execution can lead to data breaches, unauthorized access, and disruption of services, impacting the confidentiality, integrity, and availability of information systems. Given the critical CVSS score, this vulnerability underscores the need for vigilant cybersecurity practices and timely patch management to protect against such threats.

6. Technical Details for Security Professionals

Vulnerability Details:

• Affected Library: gray-matter library used within md-to-pdf.
• Exploitation Trigger: JavaScript delimiters within the front-matter block of a Markdown file.
• Patch Information: The issue is resolved in md-to-pdf version 5.2.5, which includes updates to the gray-matter library to prevent arbitrary code execution.

References:

• GitHub Advisory: GHSA-547r-qmjm-8hvw
• Commit Reference: 46bdcf2051c8d1758b391c1353185a179a47a4d9
• Repository: md-to-pdf GitHub Repository

Aliases:

• CVE-2025-65108
• GHSA-547r-qmjm-8hvw

Assigner:

• GitHub_M

ENISA IDs:

• Product: md-to-pdf versions < 5.2.5
• Vendor: simonhaenisch

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risks associated with this critical issue and enhance their overall cybersecurity posture.