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CVE-2025-53531: DoS Vulnerability in WeGIA Server Due to Improper Validation of HTTP GET Requests

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Overview

The CVE-2025-53531 vulnerability is a serious security issue that affects WeGIA servers, an application widely used by charitable institutions. The vulnerability lies in the server’s processing of excessively long HTTP GET requests, leading to high resource consumption and potential Denial of Service (DoS) attacks. This issue poses a significant threat to the integrity and availability of services provided by these institutions.

Vulnerability Summary

CVE ID: CVE-2025-53531
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, potential data leakage, and denial of service

Affected Products

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Product | Affected Versions

WeGIA Server | Before 3.3.0

How the Exploit Works

The vulnerability stems from the WeGIA server’s lack of validation for the length of the ‘fid’ parameter in HTTP GET requests. Attackers can exploit this by crafting and sending excessively long GET requests to a specific URL on the server. The server processes URLs up to 8,142 characters long, resulting in high resource consumption, elevated latency, timeouts, and read errors. This makes the server susceptible to DoS attacks and potentially allows for system compromise or data leakage.

Conceptual Example Code

Here is a conceptual example of how an attacker might exploit this vulnerability.

GET /example_url?fid=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...[up to 8142 characters] HTTP/1.1
Host: target.example.com

In this example, the ‘fid’ parameter is filled with an excessively long string, leading to the aforementioned issues.

Mitigation Guidance

Users are advised to update their WeGIA server to version 3.3.0 or later, where this vulnerability has been fixed. If updating is not immediately possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation against potential attacks.

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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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