CVE-2013-7003 in LiveZilla
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in LiveZilla before 5.1.2.0 allow remote attackers to inject arbitrary web script or HTML via the (1) full name field, (2) company field, or (3) filename to chat.php.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 05/12/2026
The vulnerability identified as CVE-2013-7003 represents a critical cross-site scripting flaw affecting LiveZilla versions prior to 5.1.2.0. This vulnerability resides in the web application's input validation mechanisms, specifically targeting three distinct user input fields that are processed without adequate sanitization. The affected fields include the full name field, company field, and filename parameter within the chat.php endpoint, creating multiple attack vectors for malicious actors seeking to exploit this weakness. The vulnerability classifies under CWE-79 which defines the common weakness of cross-site scripting, a pervasive issue in web applications where untrusted data is improperly handled and executed within the browser context of legitimate users.
The technical exploitation of this vulnerability occurs when remote attackers submit malicious payloads through the vulnerable input fields, which are then processed and rendered in the web application interface without proper HTML encoding or sanitization. When other users view the affected pages containing the malicious input, their browsers execute the injected scripts, potentially leading to session hijacking, credential theft, or redirection to malicious websites. The attack vector is particularly concerning because it targets fields that are commonly populated by users during chat interactions, making the exploitation surface quite broad and difficult to monitor effectively. The filename parameter in chat.php represents a particularly dangerous vector since file uploads often bypass typical input validation checks and may contain executable content that can be rendered in the browser.
The operational impact of this vulnerability extends beyond simple script execution, potentially allowing attackers to establish persistent access to user sessions and compromise the integrity of the chat system. Attackers could leverage these XSS vulnerabilities to inject malicious scripts that steal cookies, modify chat content, or redirect users to phishing sites that mimic the legitimate LiveZilla interface. This type of vulnerability aligns with ATT&CK technique T1566 which covers social engineering tactics, specifically focusing on the manipulation of user trust through web-based attacks. The vulnerability affects both end-user experience and system security, as compromised sessions could provide attackers with access to sensitive customer communications and potentially enable further lateral movement within the network if the LiveZilla system is integrated with other business applications.
Organizations utilizing LiveZilla should implement immediate mitigations including upgrading to version 5.1.2.0 or later, which contains the necessary patches to address the XSS vulnerabilities. Input validation should be strengthened across all user-facing fields, implementing proper HTML encoding and sanitization techniques to prevent script injection. Additionally, organizations should consider implementing content security policies to limit script execution within the application context. The vulnerability demonstrates the importance of regular security updates and input validation practices, as outlined in OWASP Top Ten 2017 category a03 which emphasizes injection flaws including XSS. Security monitoring should include detection of unusual input patterns in the affected fields, and network traffic analysis should be employed to identify potential exploitation attempts. Organizations should also consider implementing web application firewalls to provide additional protection against similar vulnerabilities in other components of their web infrastructure.