CVE-2019-7349 in ZoneMinder
Summary
by MITRE
Reflected Cross Site Scripting (XSS) exists in ZoneMinder through 1.32.3, allowing an attacker to execute HTML or JavaScript code via a vulnerable 'newMonitor[V4LCapturesPerFrame]' parameter value in the view monitor (monitor.php) because proper filtration is omitted.
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Analysis
by VulDB Data Team • 08/27/2025
The vulnerability CVE-2019-7349 represents a reflected cross site scripting flaw in ZoneMinder version 1.32.3 and earlier, classified under CWE-79 as improper neutralization of input during web output. This vulnerability resides within the monitor.php web page where user input is directly reflected back to the browser without adequate sanitization or encoding mechanisms. The specific attack vector involves the 'newMonitor[V4LCapturesPerFrame]' parameter which serves as an entry point for malicious payloads that can be executed in the context of other users' browsers. The flaw allows an attacker to inject HTML or JavaScript code through manipulated input values, making it particularly dangerous for web applications that handle user-supplied data.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding practices within the ZoneMinder application's monitoring interface. When a user submits a request containing malicious code in the specified parameter, the application fails to properly filter or escape the input before rendering it in the web page response. This creates an environment where attacker-controlled content can be executed by other users who view the affected page, establishing a classic reflected XSS scenario. The vulnerability is particularly concerning as it operates within the core monitoring functionality of ZoneMinder, which is designed for security surveillance and monitoring purposes, making it a prime target for exploitation in environments where sensitive security data is managed.
The operational impact of CVE-2019-7349 extends beyond simple code execution, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, and redirection to malicious sites. According to ATT&CK framework technique T1566, this vulnerability represents a method for initial access through malicious input, while T1059 demonstrates the exploitation of command and scripting interpreters. The attack can be executed through social engineering tactics where users are tricked into clicking malicious links that contain the crafted payload. Given that ZoneMinder is commonly deployed in security-sensitive environments such as home surveillance systems, commercial security installations, and industrial monitoring systems, the potential for data compromise and unauthorized access is significant. The reflected nature of the vulnerability means that successful exploitation requires user interaction with a malicious link, but once triggered, the consequences can be severe.
Mitigation strategies for this vulnerability should include immediate implementation of input validation and output encoding measures within the ZoneMinder application. The recommended approach involves sanitizing all user-supplied input through proper encoding functions such as htmlspecialchars() or equivalent mechanisms before rendering any user data in the web interface. Additionally, implementing a Content Security Policy (CSP) header can provide an additional layer of protection against XSS attacks by restricting the sources from which scripts can be executed. Organizations should also consider upgrading to ZoneMinder version 1.32.4 or later, which contains the necessary patches to address this vulnerability. Security monitoring and logging should be enhanced to detect suspicious input patterns, and regular security assessments should be conducted to identify similar input validation weaknesses. The vulnerability aligns with CWE-352 which addresses cross site request forgery, and while not identical, both vulnerabilities highlight the importance of proper input validation and output encoding in web applications. Regular security training for administrators and users can also help mitigate the risk of successful exploitation through social engineering attacks that rely on user interaction with malicious payloads.