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CVE-2025-52817: Authorization Bypass in ZealousWeb Abandoned Contact Form 7 Leads to Potential System Compromise

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Overview

In this post, we’ll delve into the details of a particularly severe vulnerability, CVE-2025-52817, that resides in the Abandoned Contact Form 7, a product of ZealousWeb. This vulnerability is of significant concern because it allows malicious actors to exploit incorrectly configured access control security levels, leading to potential system compromise and data leakage. Given the widespread use of contact forms on websites for user interaction, this vulnerability affects a broad user base, making it an urgent issue to address.

Vulnerability Summary

CVE ID: CVE-2025-52817
Severity: High (8.2 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise and data leakage

Affected Products

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Product | Affected Versions

ZealousWeb Abandoned Contact Form 7 | All versions up to 2.0

How the Exploit Works

Due to missing authorization checks in the Abandoned Contact Form 7, an attacker can exploit the system by sending specially crafted requests to the system. As the system lacks sufficient access control measures, these requests are processed, allowing the attacker to bypass the system’s defenses. This, in turn, enables the attacker to gain unauthorized access to sensitive system resources, which can result in system compromise and potential data leakage.

Conceptual Example Code

Here’s a conceptual example of how the vulnerability might be exploited. This is a sample HTTP request that a malicious actor could use:

POST /abandoned_contact_form_7_endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "Exploit command/Code here" }

Mitigation and Prevention

The best way to protect your system from this vulnerability is to apply the vendor patch as soon as it becomes available. If the patch is not yet available or cannot be applied immediately, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as temporary mitigation. These tools can help identify and block the malformed requests that exploit this vulnerability. Regularly updating security protocols and performing rigorous authorization checks can also help prevent similar vulnerabilities in the future.
In conclusion, while CVE-2025-52817 is a severe threat, by staying informed about the latest vulnerabilities and applying the appropriate mitigations, system administrators can effectively safeguard their systems against potential breaches.

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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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