CVE-2025-49013

Comprehensive Technical Analysis of CVE-2025-49013

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-49013 CVSS Score: 9.9

The vulnerability identified in CVE-2025-49013 is a critical code injection flaw within the WilderForge organization's GitHub Actions workflows. The unsafe usage of user-controlled variables directly in shell script contexts allows for arbitrary command execution. This vulnerability is rated with a CVSS score of 9.9, indicating a high severity due to the potential for complete system compromise.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Pull Request Review Injection: A malicious actor can craft a pull request review containing shell metacharacters or commands. When the GitHub Actions workflow processes this review, the injected commands are executed.
• User-Controlled Variables: Any user-controlled input that is directly used in shell scripts within the GitHub Actions workflow can be exploited to inject malicious commands.

Exploitation Methods:

• Arbitrary Command Execution: By injecting shell commands into the review body or other user-controlled variables, an attacker can execute arbitrary code on the GitHub Actions runner.
• Privilege Escalation: The executed commands run with the permissions of the workflow, potentially allowing the attacker to access sensitive information, modify files, or compromise the CI infrastructure.

3. Affected Systems and Software Versions

Affected Repositories:

• WilderForge/WilderForge
• WilderForge/ExampleMod
• WilderForge/WilderWorkspace
• WilderForge/WildermythGameProvider
• WilderForge/AutoSplitter
• WilderForge/SpASM
• WilderForge/thrixlvault
• WilderForge/MassHash
• WilderForge/DLC_Disabler

Affected Users:

• Developers maintaining or contributing to the above repositories.
• Users who fork any of the above repositories and reuse affected GitHub Actions workflows.

Unaffected Users:

• End users of the software who only install pre-built releases or artifacts.
• Users whose runtime behavior of the software or compiled outputs is not impacted unless produced during exploitation.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Disable GitHub Actions: Temporarily disable GitHub Actions in affected repositories to prevent exploitation.
• Remove Affected Workflows: Remove or disable the affected workflows until a fix is implemented.

Long-Term Mitigation:

• Sanitize Inputs: Ensure all user-controlled inputs are properly sanitized before being used in shell scripts.
• Use Safe Scripting Practices: Follow GitHub's security hardening guidelines for GitHub Actions to prevent script injection.
• Regular Audits: Conduct regular security audits of GitHub Actions workflows to identify and mitigate potential vulnerabilities.

5. Impact on Cybersecurity Landscape

The discovery of CVE-2025-49013 highlights the critical importance of securing CI/CD pipelines, particularly those using GitHub Actions. This vulnerability underscores the need for:

• Robust Input Validation: Ensuring that all inputs, especially those from untrusted sources, are validated and sanitized.
• Security Best Practices: Adopting best practices for securing GitHub Actions and other CI/CD tools.
• Continuous Monitoring: Implementing continuous monitoring and auditing of CI/CD pipelines to detect and respond to potential threats.

6. Technical Details for Security Professionals

Vulnerability Details:

• Unsafe Variable Usage: The vulnerability arises from the direct use of ${{ github.event.review.body }} and other user-controlled variables in shell scripts within GitHub Actions workflows.
• Code Injection: This allows for code injection, where malicious shell commands can be executed on the GitHub Actions runner.

Mitigation Techniques:

• Input Sanitization: Use functions or libraries that sanitize inputs to prevent injection attacks.
• Environment Variables: Avoid using user-controlled inputs directly in shell scripts. Instead, use environment variables with proper validation.
• Security Hardening: Refer to GitHub's security hardening guidelines for GitHub Actions to implement secure coding practices.

References:

• GitHub CodeQL Query Help
• GitHub Security Hardening for Actions
• Understanding Script Injection Risks
• WilderForge Security Advisory
• GitHub Security Lab Research

By addressing this vulnerability promptly and adopting robust security practices, organizations can significantly reduce the risk of similar attacks in the future.