CVE-2018-17441 in Central WiFi Manager
Summary
by MITRE
An issue was discovered on D-Link Central WiFi Manager before v 1.03r0100-Beta1. The 'username' parameter of the addUser endpoint is vulnerable to stored XSS.
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Analysis
by VulDB Data Team • 04/13/2025
The vulnerability identified in D-Link Central WiFi Manager represents a critical security flaw that exposes users to persistent cross-site scripting attacks through a stored XSS vector. This issue affects versions prior to v1.03r0100-Beta1 and specifically targets the addUser endpoint where the username parameter fails to properly sanitize user input. The flaw allows attackers to inject malicious scripts that persist in the application's database and execute whenever the affected page is loaded, making it particularly dangerous for administrative interfaces where sensitive user data is managed.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the Central WiFi Manager's user management functionality. When administrators or legitimate users interact with the addUser endpoint, the system accepts username values without proper sanitization of potentially malicious content. This failure in input validation creates a persistent XSS vulnerability where attacker-controlled scripts can be stored in the application's backend and executed in the context of other users' browsers. The vulnerability operates at the application layer and specifically aligns with CWE-79 which defines cross-site scripting flaws as weaknesses that allow attackers to inject client-side scripts into web applications.
The operational impact of this vulnerability extends beyond simple script execution as it provides attackers with the capability to perform session hijacking, steal sensitive user credentials, and potentially escalate privileges within the administrative interface. An attacker who successfully exploits this vulnerability can manipulate the Central WiFi Manager's user interface to redirect legitimate users to malicious sites, extract session cookies, or even modify user permissions. The stored nature of the vulnerability means that once exploited, the malicious payload persists until manually removed from the system, creating a long-term threat vector that can affect multiple users over extended periods.
This vulnerability directly maps to several ATT&CK techniques including T1566 for social engineering through malicious file execution and T1059 for command and scripting interpreter usage. The attack chain typically involves initial access through web application exploitation followed by privilege escalation and data exfiltration. Organizations using D-Link Central WiFi Manager should implement immediate mitigations including input validation, output encoding, and regular security updates to prevent exploitation. The recommended remediation approach involves patching to version 1.03r0100-Beta1 or later, implementing proper parameter validation for all user input fields, and establishing monitoring for suspicious user account creation activities. Additionally, network segmentation and access controls should be enforced to limit potential damage from successful exploitation attempts.