CVE-2025-47733: Microsoft Power Apps SSRF Vulnerability

CVE-2025-47733 Overview

CVE-2025-47733 is a Server-Side Request Forgery (SSRF) vulnerability affecting Microsoft Power Apps. This security flaw allows an unauthorized attacker to exploit the application's server-side request handling mechanism to disclose sensitive information over a network. SSRF vulnerabilities enable attackers to induce the server-side application to make HTTP requests to an arbitrary domain of the attacker's choosing, potentially accessing internal resources, cloud metadata services, or other protected network segments.

Critical Impact

An unauthorized attacker can exploit this SSRF vulnerability to disclose sensitive information from internal network resources, cloud infrastructure metadata, or other protected systems accessible from the Microsoft Power Apps server environment.

Affected Products

• Microsoft Power Apps

Discovery Timeline

• May 8, 2025 - CVE-2025-47733 published to NVD
• May 21, 2025 - Last updated in NVD database

Technical Details for CVE-2025-47733

Vulnerability Analysis

This SSRF vulnerability in Microsoft Power Apps stems from inadequate validation of user-supplied URLs or endpoints that the server processes. When the application fails to properly sanitize and restrict URL parameters, attackers can manipulate requests to target internal services, cloud provider metadata endpoints (such as 169.254.169.254 for Azure IMDS), or other network-accessible resources that should not be externally reachable.

The vulnerability is classified under CWE-918 (Server-Side Request Forgery), which describes scenarios where a web application fetches a remote resource without sufficiently validating the user-supplied URL. In cloud environments like Microsoft Azure where Power Apps operates, SSRF vulnerabilities pose significant risks as they can expose cloud instance metadata, access tokens, and internal service configurations.

Root Cause

The root cause of CVE-2025-47733 lies in insufficient input validation and URL filtering within Microsoft Power Apps' server-side request handling components. The application fails to adequately restrict or sanitize URLs provided through user input before making server-side HTTP requests, allowing attackers to specify arbitrary destinations including internal network addresses and cloud metadata services.

Attack Vector

The attack is conducted over the network without requiring authentication or user interaction. An attacker can craft malicious requests containing URLs pointing to internal resources, leveraging the Power Apps server as a proxy to access otherwise restricted endpoints. This could include:

• Targeting internal Azure services and APIs
• Accessing cloud instance metadata endpoints to retrieve credentials or configuration data
• Scanning internal network infrastructure to identify additional attack surfaces
• Exfiltrating sensitive data from internal databases or services

The vulnerability mechanism involves crafting requests that cause the Power Apps server to initiate outbound connections to attacker-specified destinations. When the server processes these requests, it may return data from internal resources that should not be accessible externally. See the Microsoft Security Advisory CVE-2025-47733 for complete technical details.

Detection Methods for CVE-2025-47733

Indicators of Compromise

• Unusual outbound connections from Power Apps servers to internal IP ranges (e.g., 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16)
• Server-side requests targeting cloud metadata endpoints such as 169.254.169.254
• Anomalous HTTP requests containing internal hostnames or IP addresses in URL parameters
• Unexpected data exfiltration patterns from internal services through Power Apps infrastructure

Detection Strategies

• Monitor network traffic for outbound connections from Power Apps servers to non-standard destinations
• Implement URL filtering and logging to identify attempts to access internal resources
• Deploy Web Application Firewall (WAF) rules to detect and block SSRF attack patterns
• Review Power Apps audit logs for suspicious request patterns targeting internal endpoints

Monitoring Recommendations

• Enable detailed logging for all server-side HTTP requests initiated by Power Apps
• Configure alerts for connections to private IP address ranges or cloud metadata services
• Implement network segmentation monitoring to detect unauthorized cross-zone communications
• Establish baseline traffic patterns to identify anomalous server-side request behavior

How to Mitigate CVE-2025-47733

Immediate Actions Required

• Review the Microsoft Security Advisory CVE-2025-47733 for the latest guidance
• Apply any available Microsoft-provided patches or updates immediately
• Implement network-level controls to restrict outbound connections from Power Apps environments
• Enable enhanced monitoring for SSRF attack indicators in your environment

Patch Information

Microsoft has addressed this vulnerability through their standard security update process. Organizations using Microsoft Power Apps should consult the Microsoft Security Advisory CVE-2025-47733 for specific patch details and deployment guidance. As Power Apps is a cloud-based service, Microsoft may apply fixes automatically; however, administrators should verify their environment's patch status through the Microsoft 365 admin center.

Workarounds

• Implement strict URL allowlisting for any features that accept user-provided URLs
• Deploy network segmentation to limit what internal resources Power Apps servers can access
• Configure Web Application Firewall rules to block requests containing internal IP addresses or suspicious URL patterns
• Consider using Azure Private Link or service endpoints to restrict network access paths

Organizations should implement defense-in-depth strategies including network segmentation, egress filtering, and monitoring to reduce the risk of SSRF exploitation while awaiting or after applying patches. Consult the Microsoft Security Response Center for the most current mitigation guidance.