CVE-2005-1866 in Calendarix Advanced
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in calendar.php in Calendarix Advanced 1.5 allows remote attackers to inject arbitrary web script or HTML via the year parameter.
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Analysis
by VulDB Data Team • 06/07/2019
The vulnerability identified as CVE-2005-1866 represents a classic cross-site scripting flaw within the Calendarix Advanced 1.5 web application, specifically affecting the calendar.php component. This issue arises from inadequate input validation and output sanitization mechanisms that fail to properly handle user-supplied data. The vulnerability is particularly concerning as it occurs in the year parameter, which is likely used to filter or display calendar events across different time periods, making it a common entry point for attackers seeking to exploit web applications.
The technical implementation of this vulnerability stems from the application's failure to sanitize user input before incorporating it into dynamic web content. When a user submits a value for the year parameter, the calendar.php script processes this input without proper validation or encoding measures. This allows malicious actors to inject arbitrary HTML or JavaScript code that gets executed in the context of other users' browsers. The flaw directly maps to CWE-79 which defines Cross-Site Scripting as a weakness where untrusted data is sent to a user agent without proper validation or encoding, enabling attackers to execute scripts in the victim's browser.
From an operational perspective, this vulnerability creates significant risks for organizations using Calendarix Advanced 1.5 as it can be exploited to perform various malicious activities. Attackers can craft payloads that steal session cookies, redirect users to malicious sites, deface the calendar interface, or even execute more sophisticated attacks such as credential harvesting. The impact extends beyond simple data theft as the vulnerability can be leveraged to establish persistent access points within the application environment. This aligns with ATT&CK technique T1531 which describes the use of malicious code injection to gain unauthorized access to systems.
The exploitation of this vulnerability typically involves crafting specially formatted URLs with malicious payloads embedded in the year parameter, which when clicked by other users triggers the execution of the injected code. The attack surface is relatively broad as calendar applications are commonly used in enterprise environments and often contain sensitive organizational information. Organizations should consider implementing comprehensive input validation, output encoding, and content security policies as mitigation strategies. The vulnerability underscores the critical importance of proper data sanitization practices and demonstrates how seemingly innocuous input fields can become attack vectors when not properly secured. This issue highlights the fundamental principle that all user-supplied data must be treated as potentially malicious and processed through appropriate security controls to prevent unauthorized code execution in web applications.