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CVE-2025-46737: Improper CORS Configuration in SEL-5037 Grid Configurator Leads to Potential System Compromise

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Overview

CVE-2025-46737 is a severe vulnerability found in the SEL-5037 Grid Configurator, a widely used application in power system infrastructure. The issue originates from the application’s overly permissive Cross-Origin Resource Sharing (CORS) configuration for its data gateway service API. This flaw exposes the system to potential unauthorized access and data leakage.

Vulnerability Summary

CVE ID: CVE-2025-46737
Severity: High (CVSS: 7.4)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage

Affected Products

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Product | Affected Versions

SEL-5037 Grid Configurator | All versions up to current

How the Exploit Works

The exploit leverages the overly permissive CORS configuration in the data gateway service of the SEL-5037 Grid Configurator. The API within the gateway service is not properly set up to reject requests from unexpected sources. This allows an attacker to make unauthorized API calls from a different domain, potentially leading to system compromise or data leakage.

Conceptual Example Code

A conceptual exploit may look something like this:

GET /api/vulnerable_endpoint HTTP/1.1
Host: target.com
Origin: attacker.com
Access-Control-Request-Method: GET

In this example, the attacker is initiating a cross-origin request from `attacker.com` to `target.com`. Due to the improper CORS configuration, the server at `target.com` may respond with sensitive data that the attacker should not have access to.

Mitigation

Users are advised to apply the vendor patch as soon as it becomes available. In the meantime, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation measure. These systems can be configured to block or alert on potential attacks exploiting this vulnerability.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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