CVE-2007-2562 in eSupport
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in index.php in Kayako eSupport 3.00.90 allows remote attackers to inject arbitrary web script or HTML via the _m parameter.
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Analysis
by VulDB Data Team • 08/31/2018
The vulnerability identified as CVE-2007-2562 represents a critical cross-site scripting flaw discovered in Kayako eSupport version 3.00.90, specifically within the index.php script. This security weakness exposes the system to remote code execution through malicious web script injection, creating significant risks for organizations relying on this customer support platform. The vulnerability manifests when the application fails to properly sanitize user input passed through the _m parameter, allowing attackers to inject arbitrary HTML or JavaScript code that executes in the context of other users' browsers. The flaw stems from inadequate input validation and output encoding mechanisms within the application's processing pipeline, making it particularly dangerous as it can be exploited without requiring authentication or special privileges from the attacker's perspective.
The technical implementation of this vulnerability follows a classic XSS attack pattern where the _m parameter serves as the injection vector, typically representing module names or functionality identifiers within the application's routing system. When users navigate to the affected page with malicious content in the _m parameter, the application processes this input without proper sanitization, subsequently rendering the injected script in the user's browser context. This creates a persistent threat where legitimate users who visit the compromised page become unwitting participants in executing malicious code, potentially leading to session hijacking, credential theft, or redirection to malicious websites. The vulnerability operates under CWE-79 which categorizes improper neutralization of input during web output, and aligns with ATT&CK technique T1059.001 for command and scripting interpreter execution through web interfaces.
The operational impact of this vulnerability extends beyond simple script injection, potentially enabling attackers to perform session fixation attacks, steal administrative privileges, or manipulate customer data through the compromised support platform. Organizations using Kayako eSupport 3.00.90 face significant risk of data breaches, service disruption, and reputational damage if this vulnerability remains unpatched. The remote nature of the attack means that exploitation can occur from anywhere on the internet, making it particularly challenging to defend against through traditional network perimeter security measures. Attackers can craft malicious URLs that, when clicked by unsuspecting users, execute their payloads automatically, creating a vector for widespread compromise across multiple user sessions. This vulnerability particularly affects web applications that process user-supplied data through URL parameters without adequate validation, highlighting the critical importance of input sanitization and output encoding in modern web development practices.
Mitigation strategies for CVE-2007-2562 require immediate patch application from Kayako, as this vulnerability represents a known security flaw that has been documented in multiple security advisories. Organizations should implement comprehensive input validation measures, including parameter sanitization and strict output encoding for all user-supplied data, particularly URL parameters like _m. The implementation of Content Security Policy headers can provide additional protection against script execution, while regular security audits of web applications should include thorough testing for XSS vulnerabilities using automated scanning tools and manual penetration testing techniques. Security teams should also consider implementing web application firewalls to monitor and filter malicious traffic patterns, and establish incident response procedures for rapid deployment of patches when vulnerabilities are discovered. The vulnerability underscores the importance of keeping all web applications updated with the latest security patches and maintaining robust security development practices throughout the software lifecycle, including proper input validation, output encoding, and security code reviews to prevent similar flaws from occurring in future deployments.