CISA Alerts: Critical GitHub Action Vulnerability Actively Exploited
TL;DR
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued a warning about a critical vulnerability in the GitHub Action tj-actions/changed-files, which is being actively exploited. This high-severity flaw, tracked as CVE-2025-30066, allows for remote code injection and has been added to CISA’s Known Exploited Vulnerabilities (KEV) catalog. The vulnerability underscores the importance of securing the software supply chain, as compromises can lead to widespread security risks.
Main Content
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a significant vulnerability related to the supply chain compromise of the GitHub Action tj-actions/changed-files to its Known Exploited Vulnerabilities (KEV) catalog. This high-severity flaw, identified as CVE-2025-30066 with a CVSS score of 8.6, allows attackers to inject malicious code remotely. The exploitation of this vulnerability enables unauthorized access and potential data breaches, highlighting the critical need for robust cybersecurity measures.
Understanding the Vulnerability
The vulnerability, tracked as CVE-2025-30066, affects the GitHub Action tj-actions/changed-files. This Action is widely used in Continuous Integration/Continuous Deployment (CI/CD) pipelines to monitor changes in files. The flaw allows attackers to inject malicious code, which can then be executed remotely. This type of compromise can lead to severe security issues, including unauthorized access to sensitive data and disruption of services.
Impact and Mitigation
The active exploitation of this vulnerability underscores the urgent need for organizations to implement robust security measures. CISA’s addition of CVE-2025-30066 to the KEV catalog mandates federal agencies to address the vulnerability within specified timelines. Organizations are advised to:
- Update Affected Systems: Immediately apply patches and updates provided by GitHub.
- Review CI/CD Pipelines: Conduct thorough reviews of CI/CD pipelines to identify and mitigate potential vulnerabilities.
- Implement Security Best Practices: Enforce strict access controls, regular audits, and continuous monitoring to detect and respond to threats promptly.
CISA’s Role in Cybersecurity
CISA plays a crucial role in safeguarding the nation’s critical infrastructure from cyber threats. By maintaining the KEV catalog, CISA helps organizations prioritize vulnerabilities that pose the most significant risks. This proactive approach is essential in mitigating the impact of cyber attacks and ensuring the integrity of digital assets.
Conclusion
The exploitation of the GitHub Action vulnerability serves as a reminder of the ongoing challenges in securing the software supply chain. Organizations must remain vigilant and proactive in their cybersecurity efforts to protect against such threats. By following CISA’s guidelines and implementing best practices, businesses can enhance their resilience against cyber attacks and safeguard their digital infrastructure.
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