CVE-2023-37657 in TwoNav
Summary
by MITRE • 07/11/2023
TwoNav v2.0.28-20230624 is vulnerable to Cross Site Scripting (XSS).
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Analysis
by VulDB Data Team • 01/18/2026
The vulnerability in TwoNav v2.0.28-20230624 represents a critical cross site scripting flaw that allows remote attackers to inject malicious scripts into web applications. This vulnerability stems from insufficient input validation and output encoding mechanisms within the application's web interface, creating an attack surface where user-supplied data is not properly sanitized before being rendered back to other users. The vulnerability manifests when the application fails to adequately escape or filter special characters in user inputs, particularly in parameters that are directly reflected in HTML responses without proper context-aware encoding.
Cross site scripting vulnerabilities in web applications typically fall under CWE-79 which specifically addresses improper neutralization of input during web page generation. The attack vector in this case likely involves manipulation of form fields, URL parameters, or other user-controllable inputs that are subsequently displayed on web pages without appropriate sanitization measures. Attackers can exploit this weakness by crafting malicious payloads that execute within the context of other users' browsers, potentially leading to session hijacking, credential theft, or data exfiltration from authenticated sessions.
The operational impact of this XSS vulnerability extends beyond simple script execution as it fundamentally compromises the integrity and confidentiality of user interactions within the TwoNav application. When successful, attackers can manipulate the application's behavior to redirect users to malicious sites, steal session cookies, modify page content, or perform actions on behalf of authenticated users. This type of vulnerability particularly affects web applications that handle sensitive user data or provide administrative functions, making it a prime target for threat actors seeking to escalate privileges or gain unauthorized access to protected resources.
Mitigation strategies for this XSS vulnerability should encompass both defensive programming practices and architectural controls. Input validation must be implemented at multiple layers including client-side and server-side validation with strict sanitization of all user-supplied data before processing or rendering. Output encoding should be context-aware, applying appropriate escaping mechanisms based on the HTML context where data is rendered such as attributes, script contexts, or URL parameters. The application should implement Content Security Policy headers to limit script execution sources and prevent unauthorized code injection. Regular security testing including automated scanning and manual penetration testing can help identify similar vulnerabilities in other parts of the application codebase.
This vulnerability aligns with several ATT&CK techniques including T1566 for credential access through phishing attacks and T1059 for command and scripting interpreter execution. The threat actor's ability to inject malicious scripts into legitimate user sessions creates a persistent attack surface that can be leveraged for extended periods without detection. Organizations should implement comprehensive patch management processes to address such vulnerabilities promptly, as the window of opportunity for exploitation increases with prolonged deployment of vulnerable software versions. The security posture of web applications depends heavily on proper input validation and output encoding practices, making this vulnerability a critical reminder of fundamental security principles that must be consistently applied throughout application development lifecycle processes.