CVE-2015-20114 in RealtyScript
Summary
by MITRE • 03/16/2026
Next Click Ventures RealtyScript 4.0.2 contains a cross-site scripting vulnerability that allows attackers to execute arbitrary HTML and script code by injecting malicious input through multiple parameters that are not properly sanitized. Attackers can craft requests with injected script payloads in vulnerable parameters to execute code in users' browser sessions within the context of the affected application.
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Analysis
by VulDB Data Team • 03/20/2026
The vulnerability identified as CVE-2015-20114 affects Next Click Ventures RealtyScript version 4.0.2, a web application designed for real estate management and listing services. This particular flaw represents a critical cross-site scripting vulnerability that fundamentally compromises the security posture of the application by allowing unauthorized code execution within user browser contexts. The vulnerability exists due to insufficient input validation and sanitization mechanisms within the application's parameter handling processes, creating persistent entry points for malicious actors to inject harmful script code.
The technical implementation of this vulnerability stems from the application's failure to properly sanitize user-supplied input across multiple parameters within its web interface. When users interact with the RealtyScript application through various forms, search functions, or parameter-based navigation, the system does not adequately filter or encode potentially malicious content before processing or displaying it. This lack of input sanitization creates a condition where attackers can inject script payloads that persistently execute within the browser sessions of other users who encounter the malicious content. The vulnerability specifically manifests when the application fails to implement proper output encoding or input validation mechanisms, allowing script code to be interpreted and executed rather than treated as benign data.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it enables attackers to manipulate user sessions and potentially gain unauthorized access to sensitive information. When successful, the XSS attack allows threat actors to execute arbitrary HTML and script code within the context of legitimate user sessions, potentially leading to session hijacking, credential theft, or redirection to malicious websites. The vulnerability affects all users interacting with the application, making it particularly dangerous as it can be exploited through various attack vectors including email links, social engineering, or compromised website content. The persistent nature of the vulnerability means that once exploited, malicious scripts can continue to execute against users until the application is patched or the vulnerable parameters are properly sanitized.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's codebase. The recommended approach includes implementing proper parameter sanitization using established security libraries and frameworks that can automatically escape or encode potentially dangerous characters in user input. Organizations should implement the principle of least privilege for input handling and ensure that all user-supplied data is validated against strict whitelists of acceptable characters and formats. Additionally, the implementation of Content Security Policy headers can provide an additional layer of protection by restricting the sources from which scripts can be loaded and executed within the application's context. This vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws, and represents a typical example of how insufficient input validation creates persistent security weaknesses in web applications.
The attack surface for this vulnerability can be significantly reduced through proper security code reviews and automated scanning tools that identify insecure parameter handling patterns. Security practitioners should implement regular penetration testing and vulnerability assessments to identify similar weaknesses in other application components. The remediation process requires comprehensive code auditing to ensure that all input parameters are properly validated and that output encoding is consistently applied throughout the application's functionality. Organizations should also consider implementing web application firewalls and runtime protection mechanisms to detect and block suspicious input patterns. This particular vulnerability demonstrates the importance of following secure coding practices and adhering to established security frameworks that emphasize input validation as a fundamental defense mechanism against common web application attacks.