CVE-2007-1845 in Expanded Calendar Module
Summary
by MITRE
SQL injection vulnerability in show_event.php in the Expanded Calendar (calendar_panel) 2.00 module for PHP-Fusion allows remote attackers to execute arbitrary SQL commands via the m_month parameter.
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Analysis
by VulDB Data Team • 11/11/2025
The vulnerability identified as CVE-2007-1845 represents a critical SQL injection flaw within the Expanded Calendar module version 2.00 for PHP-Fusion content management system. This security weakness specifically affects the show_event.php script which handles calendar event display functionality. The vulnerability stems from inadequate input validation and sanitization of user-supplied data, particularly the m_month parameter that controls month-based calendar views. Attackers can exploit this weakness by crafting malicious SQL payloads through the m_month parameter, potentially gaining unauthorized access to the underlying database system.
The technical exploitation of this vulnerability follows the classic SQL injection attack pattern where user input directly influences SQL query construction without proper sanitization or parameterization. When the m_month parameter is processed by the show_event.php script, it gets concatenated directly into SQL queries without appropriate escaping or validation mechanisms. This creates an environment where malicious actors can inject arbitrary SQL commands that execute with the privileges of the database user account used by PHP-Fusion. The vulnerability falls under CWE-89 which specifically addresses SQL injection flaws in software applications, making it a well-documented and widely recognized security weakness in web applications.
The operational impact of this vulnerability extends beyond simple data theft, as successful exploitation could enable attackers to perform complete database compromise including data modification, deletion, or unauthorized access to sensitive information. Attackers might leverage this vulnerability to escalate privileges, extract user credentials, modify calendar entries, or even gain shell access to the underlying server depending on the database configuration and permissions. The Expanded Calendar module being part of PHP-Fusion makes this vulnerability particularly dangerous as it could affect numerous websites running this CMS, potentially compromising multiple calendar-based applications simultaneously. The remote nature of the attack means that exploitation can occur from any location without requiring physical access to the target system.
Security mitigation strategies for this vulnerability should focus on immediate input validation and parameterized query implementation. The most effective remediation involves updating the affected PHP-Fusion module to a patched version that properly sanitizes all user inputs before processing. Organizations should implement proper input validation techniques including whitelisting acceptable characters and ranges for the m_month parameter, while also adopting prepared statements or parameterized queries to prevent SQL injection. Additionally, network-level protections such as web application firewalls can provide additional layers of defense against exploitation attempts. This vulnerability aligns with ATT&CK technique T1190 which covers exploitation of remote services, and represents a classic example of how inadequate input validation can lead to severe database compromise scenarios. Regular security audits and vulnerability assessments should be conducted to identify similar weaknesses in other components of the PHP-Fusion platform or related applications.