CVE-2010-4276 in LiveZilla
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the lz_tracking_set_sessid function in templates/jscript/jstrack.tpl in LiveZilla 3.2.0.2 allows remote attackers to inject arbitrary web script or HTML via the livezilla parameter in a track action to server.php.
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Analysis
by VulDB Data Team • 09/21/2025
The vulnerability identified as CVE-2010-4276 represents a critical cross-site scripting flaw within the LiveZilla customer support platform version 3.2.0.2. This vulnerability specifically affects the lz_tracking_set_sessid function located in the templates/jscript/jstrack.tpl file, creating a dangerous attack vector that enables remote adversaries to execute malicious scripts within the context of legitimate user sessions. The flaw manifests when the livezilla parameter is passed through a track action to the server.php endpoint, allowing attackers to inject arbitrary web scripts or HTML code that can persist and execute in victim browsers.
The technical implementation of this vulnerability stems from inadequate input validation and output sanitization within the LiveZilla tracking mechanism. The system fails to properly escape or filter user-supplied data before incorporating it into dynamic JavaScript code segments. This weakness falls under CWE-79, which specifically addresses cross-site scripting vulnerabilities where untrusted data is improperly incorporated into web pages without adequate sanitization. The vulnerability exists because the application directly embeds user-controllable parameters into JavaScript execution contexts without proper context-aware encoding or validation mechanisms.
From an operational perspective, this vulnerability presents significant risks to organizations using LiveZilla for customer support and live chat services. Attackers can leverage this flaw to hijack user sessions, steal sensitive information, perform unauthorized actions on behalf of victims, or redirect users to malicious websites. The impact extends beyond simple script injection as it can enable more sophisticated attacks including credential theft, session fixation, and the delivery of malware through drive-by downloads. The vulnerability affects all users who interact with the LiveZilla tracking system, making it particularly dangerous in environments where customer support chat systems are widely used.
The exploitation of this vulnerability requires minimal technical skill and can be accomplished through simple HTTP requests that include malicious payloads in the livezilla parameter. Security researchers have identified this as a prime example of how web application frameworks can introduce XSS vulnerabilities when they fail to implement proper input validation at multiple layers of the application stack. Organizations should consider implementing comprehensive input validation, output encoding, and content security policies as mitigation strategies. The ATT&CK framework categorizes this vulnerability under T1059.007 for scripting languages and T1566 for phishing attacks, highlighting how such vulnerabilities can serve as initial access points for broader attack campaigns. Organizations using LiveZilla should immediately apply the vendor-provided patch or upgrade to a secure version that properly sanitizes input parameters before incorporating them into JavaScript contexts.