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CVE-2025-7650: Local File Inclusion Vulnerability in BizCalendar Web Plugin for WordPress

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Overview

The BizCalendar Web plugin for WordPress versions up to and including 1.1.0.50 suffers from a critical Local File Inclusion vulnerability. The vulnerability, tracked as CVE-2025-7650, could allow an authenticated attacker with Contributor-level access or higher to execute arbitrary files on the server and potentially compromise the system. Businesses using this plugin must take immediate action to secure their systems.

Vulnerability Summary

CVE ID: CVE-2025-7650
Severity: High (7.5 CVSS)
Attack Vector: Local File Inclusion
Privileges Required: Contributor-level access
User Interaction: Required
Impact: System compromise, data leakage

Affected Products

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Product | Affected Versions

BizCalendar Web plugin for WordPress | Up to and including 1.1.0.50

How the Exploit Works

An attacker with Contributor-level access can exploit this vulnerability by using the ‘bizcalv’ shortcode, which is vulnerable to Local File Inclusion. By manipulating the shortcode, an attacker can include and execute arbitrary files on the server. If the attacker can upload and include PHP files or other “safe” file types like images, they can execute arbitrary PHP code in those files. This could allow the attacker to bypass access controls, obtain sensitive data, or even execute code on the server.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. In this scenario, the attacker utilizes the ‘bizcalv’ shortcode to include a malicious PHP file.

POST /wp-admin/admin-ajax.php?action=bizcalendar_render&bizcalv=/../../../../malicious.php HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
{ "shortcode": "[bizcalv]" }

Mitigation Guidance

The recommended mitigation strategy is to apply the vendor patch as soon as it is available. In the meantime, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation measure.

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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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