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CVE-2025-52970: Fortinet FortiWeb’s Critical Parameter Handling Vulnerability

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Overview

The CVE-2025-52970 is a severe vulnerability found in specific versions of the Fortinet FortiWeb system. This vulnerability affects versions 7.6.3 and below, versions 7.4.7 and below, versions 7.2.10 and below, and 7.0.10 and below. This vulnerability is critical because it allows an unauthenticated remote attacker, armed with non-public information about the device and targeted user, to gain admin privileges on the device via a specially crafted request.
This vulnerability poses a significant risk to any organization using the affected versions of Fortinet FortiWeb, as it could potentially lead to a full system compromise or data leakage. Therefore, organizations need to take immediate action to mitigate this risk.

Vulnerability Summary

CVE ID: CVE-2025-52970
Severity: High (CVSS 8.1)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Full system compromise or data leakage

Affected Products

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Product | Affected Versions

Fortinet FortiWeb | 7.6.3 and below
Fortinet FortiWeb | 7.4.7 and below
Fortinet FortiWeb | 7.2.10 and below
Fortinet FortiWeb | 7.0.10 and below

How the Exploit Works

This vulnerability stems from the improper handling of parameters within the Fortinet FortiWeb system. An attacker can exploit this weakness by crafting a specific request containing malicious data. If this request is processed by the Fortinet FortiWeb system, the attacker could potentially manipulate the system into granting them admin privileges.
This exploit does not require any pre-existing privileges or user interaction, making it a grave risk as it allows attackers to gain unauthorized access to systems and data.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited:

POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"device_info": "non-public information",
"user_target": "targeted user",
"admin_request": "specially crafted request"
}

In this example, the attacker sends a POST request with a malicious payload containing non-public information about the device, the targeted user, and a specially crafted request that tricks the system into granting them admin privileges.

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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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