Overview of CVE-2025-47733

In May 2025, Microsoft disclosed a critical security vulnerability identified as CVE-2025-47733, affecting its Power Apps platform. This Server-Side Request Forgery (SSRF) flaw allows unauthorized attackers to disclose information over a network without requiring user interaction. The vulnerability has been assigned a CVSS score of 9.1, indicating its severity. (tenable.com)

Technical Details

SSRF vulnerabilities occur when an attacker can manipulate a server to make unintended requests to internal or external resources. In the case of CVE-2025-47733, the flaw resides in how Power Apps processes specific types of requests, enabling attackers to:

  • Forge HTTP or HTTPS requests from the server hosting the Power Apps environment.
  • Target internal Azure resources, private APIs, or metadata services.
  • Potentially abuse existing privileges within the Power Apps service to authorize requests.

This vulnerability is particularly concerning due to Power Apps' integration within the Microsoft 365 ecosystem, which could allow attackers to access sensitive internal services and data. (windowsforum.com)

Potential Impact

Exploitation of CVE-2025-47733 could lead to:

  • Unauthorized disclosure of internal endpoints and services.
  • Exfiltration of sensitive data such as access tokens and configuration files.
  • Potential downstream attacks against other Azure resources exposed via internal APIs.

Given Power Apps' widespread use across various sectors, including finance, healthcare, and government, the implications of this vulnerability are significant. (windowsforum.com)

Microsoft's Response and Mitigation

Upon discovery, Microsoft acted swiftly to mitigate the risk associated with CVE-2025-47733. The company issued security updates and provided detailed remediation guidance. Notably, Microsoft emphasized that no customer action is necessary, as the vulnerability has been fully mitigated at the platform level. (cybersecuritynews.com)

Best Practices for Organizations

While Microsoft has addressed this specific vulnerability, organizations should adopt the following measures to enhance their security posture:

  • Regular Updates: Ensure all systems and applications are up-to-date with the latest security patches.
  • Input Validation: Implement strict validation of user inputs to prevent malicious data from being processed.
  • Access Controls: Enforce the principle of least privilege, granting users only the access necessary for their roles.
  • Monitoring and Logging: Continuously monitor network traffic and application logs for unusual activity.
  • Security Training: Educate employees about common security threats and safe practices.

By proactively implementing these practices, organizations can reduce the risk of similar vulnerabilities and strengthen their overall security framework.

Conclusion

The disclosure of CVE-2025-47733 underscores the importance of vigilance in cloud security. Microsoft's prompt response and mitigation efforts highlight the need for continuous monitoring and proactive security measures. Organizations must remain diligent in applying best practices to safeguard their systems against evolving threats.