CVE-2018-8737 in Control Panel
Summary
by MITRE
Bookme Control Panel 2.0 Application is vulnerable to stored XSS within the Customers "Book Me" function. Within the Name and Note (aka custName and custNote) sections of the Customers screen, the application does not sanitize user-supplied input and renders injected JavaScript code to the user's browser.
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Analysis
by VulDB Data Team • 01/14/2020
The Bookme Control Panel 2.0 application presents a critical stored cross-site scripting vulnerability that compromises user session integrity and system security. This vulnerability exists within the Customers "Book Me" function where the application fails to properly sanitize user input in the Name and Note fields. The flaw allows attackers to inject malicious JavaScript code that persists in the application's database and executes whenever affected users view the customer records. The vulnerability specifically affects the custName and custNote parameters, which are rendered directly to user browsers without adequate input validation or output encoding mechanisms.
From a technical perspective, this stored XSS vulnerability represents a sophisticated attack vector that leverages the application's failure to implement proper data sanitization protocols. The vulnerability stems from the application's inability to distinguish between legitimate user input and malicious script payloads, allowing attackers to inject JavaScript code that executes in the context of authenticated users' browsers. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws in web applications, and aligns with ATT&CK technique T1566.001 for initial access through malicious content. The persistent nature of stored XSS means that once malicious code is injected, it remains active until manually removed from the database, creating a continuous threat vector.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it enables attackers to hijack user sessions and potentially escalate privileges within the application. When authenticated users view customer records containing malicious scripts, the injected JavaScript executes in their browsers, potentially stealing session cookies, redirecting users to malicious sites, or performing unauthorized actions within the application. This vulnerability can be exploited by attackers who gain access to the application through other means or by social engineering campaigns targeting users with sufficient privileges to modify customer records. The attack chain typically involves an attacker identifying a user with appropriate permissions, injecting malicious code into customer data, and waiting for the victim to view the affected records, which then executes the payload in their browser context.
Mitigation strategies for this vulnerability require immediate implementation of robust input validation and output encoding mechanisms throughout the application's data handling processes. The primary defense involves implementing proper sanitization of all user-supplied input before storage, including the use of HTML entity encoding for output rendering. Organizations should deploy Content Security Policy headers to limit script execution and implement proper input validation frameworks that reject or sanitize potentially dangerous characters and script tags. Additionally, privilege separation and role-based access controls should be enforced to limit which users can modify customer records, reducing the attack surface. Regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other application components, while comprehensive logging and monitoring systems should be implemented to detect suspicious activities related to customer data modifications. The vulnerability also underscores the importance of secure coding practices and regular security training for developers to prevent similar issues in future application development cycles.