CVE-2008-3700 in SupportSuite
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Kayako SupportSuite 3.20.02 and earlier allow remote attackers to inject arbitrary web script or HTML via (1) the sessionid parameter in a livesupport startclientchat action to visitor/index.php; (2) the filter parameter in a news view action to index.php; or the Full Name field in a (3) account creation, (4) ticket opening, or (5) chat request operation.
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Analysis
by VulDB Data Team • 07/29/2025
The CVE-2008-3700 vulnerability represents a critical cross-site scripting flaw affecting Kayako SupportSuite versions 3.20.02 and earlier, demonstrating the persistent security challenges in customer support and helpdesk software systems. This vulnerability manifests across multiple attack vectors within the application's web interface, creating significant exposure for organizations relying on this support platform for customer communication and ticket management. The flaw exists due to insufficient input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before processing or displaying it within the application's web pages.
The technical exploitation of this vulnerability occurs through three distinct pathways that collectively demonstrate poor security design patterns in the application's data handling processes. The first vector involves the sessionid parameter within the livesupport startclientchat action targeting visitor/index.php, where an attacker can inject malicious scripts through session identifiers that are not properly validated or escaped. The second vulnerability exists in the filter parameter of news view operations directed at index.php, where user input is directly incorporated into dynamic web content without adequate sanitization. The third and fourth attack vectors target user registration and communication functions, specifically the Full Name field during account creation, ticket opening, and chat request operations, where malicious input can be executed when user data is displayed in subsequent web pages.
This vulnerability directly maps to CWE-79, which defines Cross-Site Scripting as a weakness where untrusted data is incorporated into web page content without proper validation or encoding. The operational impact extends beyond simple data theft or defacement, as successful exploitation can enable attackers to hijack user sessions, redirect victims to malicious websites, or extract sensitive information from authenticated user sessions. The vulnerability affects the core functionality of the support suite, potentially compromising customer data, system integrity, and organizational security posture. Attackers could leverage these flaws to establish persistent access to support systems, monitor user activities, or execute malicious code against other users within the same browser session.
The security implications of this vulnerability align with ATT&CK technique T1531, which covers "Account Access Removal", and T1059, covering "Command and Scripting Interpreter", as attackers could use these XSS flaws to escalate privileges, access administrative functions, or establish command execution capabilities. Organizations using affected versions of Kayako SupportSuite face significant risk of unauthorized access to customer support data, potential data breaches, and compromise of user credentials. The vulnerability's presence in multiple operational areas of the application indicates fundamental security architecture flaws rather than isolated incidents, suggesting that similar vulnerabilities may exist in other input handling components.
Mitigation strategies for this vulnerability require immediate implementation of input validation, output encoding, and proper sanitization mechanisms across all user-supplied data entry points. Organizations should implement comprehensive parameter validation, employ context-specific output encoding, and establish proper content security policies to prevent script execution in web contexts. The recommended remediation includes upgrading to Kayako SupportSuite versions that address these vulnerabilities, implementing web application firewalls, and establishing regular security testing procedures. Additionally, organizations should conduct thorough code reviews focusing on input handling and output encoding practices, while implementing proper session management and user authentication controls to minimize the attack surface. Security teams must also establish monitoring procedures to detect and respond to potential exploitation attempts targeting these XSS vulnerabilities in support systems.