CVE-2005-4011 in ltwCalendar
Summary
by MITRE
SQL injection vulnerability in calendar.php in Codewalkers ltwCalendar (aka PHP Event Calendar) 4.2, 4.1.3, and earlier allows remote attackers to execute arbitrary SQL commands via the id parameter.
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Analysis
by VulDB Data Team • 09/21/2025
The CVE-2005-4011 vulnerability represents a critical sql injection flaw in the ltwCalendar component of Codewalkers, specifically affecting versions 4.2 and 4.1.3 and earlier. This vulnerability resides within the calendar.php script which serves as the primary interface for calendar functionality in the php event calendar system. The flaw manifests when the application fails to properly sanitize user input passed through the id parameter, creating an exploitable entry point for malicious actors to manipulate database queries. The vulnerability classification aligns with cwe-89 which specifically addresses sql injection vulnerabilities where untrusted data is directly incorporated into sql commands without adequate sanitization or parameterization. This weakness allows attackers to construct malicious sql payloads that bypass normal authentication and authorization mechanisms, potentially enabling full database compromise.
The operational impact of this vulnerability extends beyond simple data theft to encompass complete system compromise and unauthorized access to sensitive information. Attackers can leverage this sql injection flaw to execute arbitrary sql commands on the underlying database server, potentially gaining read access to all stored data including user credentials, event information, and system configuration details. The vulnerability's remote exploitation capability means that attackers do not require physical access to the system, making it particularly dangerous in web-facing environments. Through sql injection techniques, malicious actors could perform data manipulation operations such as updating user accounts, deleting calendar entries, or even executing system commands if the database user has appropriate privileges. The attack vector through the id parameter suggests that calendar event identifiers are directly incorporated into database queries without proper input validation, creating a straightforward path for exploitation.
The technical exploitation of this vulnerability follows standard sql injection attack patterns where attackers craft malicious input strings designed to alter the intended sql query execution flow. The id parameter serves as the primary attack surface where an attacker could inject sql payload strings that terminate the original query and append malicious commands. This type of vulnerability is particularly concerning in calendar applications as it may expose sensitive event data, user information, and potentially system configuration details that could be used for further attacks. The vulnerability's presence in multiple versions indicates a persistent flaw in the application's input handling mechanisms, suggesting inadequate security testing during development phases and highlighting the importance of proper input validation practices. Organizations running affected versions should immediately implement security patches or mitigations to prevent exploitation and protect against potential data breaches. The attack surface is further expanded by the fact that calendar systems often contain personal and sensitive information, making them attractive targets for cybercriminals seeking unauthorized access to user data and system resources.
Mitigation strategies for CVE-2005-4011 should focus on implementing proper input validation, parameterized queries, and input sanitization techniques to prevent sql injection attacks. Organizations should upgrade to patched versions of the ltwCalendar component or implement web application firewalls to detect and block malicious sql injection attempts. The implementation of proper database access controls and principle of least privilege should be enforced to limit the impact of successful exploitation attempts. Additionally, regular security assessments and code reviews should be conducted to identify and remediate similar vulnerabilities in other applications. The vulnerability serves as a reminder of the critical importance of secure coding practices and input validation in preventing sql injection attacks that continue to represent one of the most prevalent and dangerous web application security threats.