CVE-2007-6728 in XMB
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in XMB 1.5 allows remote attackers to inject arbitrary web script or HTML via the MSN field during user registration.
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Analysis
by VulDB Data Team • 11/18/2018
The vulnerability described in CVE-2007-6728 represents a classic cross-site scripting flaw affecting XMB version 1.5, a web-based bulletin board system that was widely used in the mid-2000s for online community discussions. This particular weakness resides in the user registration process where the system fails to properly sanitize input data submitted through the MSN field, which is typically used for instant messaging identifiers. The vulnerability classification aligns with CWE-79, which specifically addresses cross-site scripting vulnerabilities where untrusted data is improperly integrated into web pages without adequate validation or encoding measures. The flaw enables malicious actors to inject arbitrary web scripts or HTML content directly into the registration form, creating a persistent security risk that affects all users interacting with the vulnerable system.
The technical exploitation of this vulnerability occurs when an attacker registers with a malicious payload in the MSN field, which then gets stored in the database and subsequently rendered on user profile pages or registration listings. This creates a server-side XSS condition where the injected code executes in the context of other users' browsers when they view the compromised registration data. The attack vector is particularly dangerous because it leverages the trust relationship between the web application and its users, as the malicious input is accepted as legitimate during the registration process and then serves as a conduit for executing harmful scripts. The vulnerability demonstrates poor input validation practices and highlights the critical importance of sanitizing all user-supplied data before it is processed or stored within the application's database.
The operational impact of this vulnerability extends beyond simple script injection, potentially enabling attackers to perform session hijacking, steal cookies, redirect users to malicious websites, or even execute arbitrary commands on affected systems. When combined with other attack techniques, this XSS vulnerability could facilitate more sophisticated attacks such as credential theft, data exfiltration, or the establishment of backdoors within the affected web environment. The persistent nature of the vulnerability means that once exploited, the malicious code continues to execute whenever affected pages are loaded, creating a long-term security risk that can compromise multiple users over time. This type of vulnerability also violates fundamental security principles outlined in the OWASP Top Ten, specifically addressing the risk of injection flaws that can lead to unauthorized access and data compromise.
Mitigation strategies for CVE-2007-6728 should focus on implementing robust input validation and output encoding mechanisms throughout the application's data flow. The most effective immediate fix involves sanitizing all user input fields, particularly those that are displayed in web pages, by removing or encoding potentially dangerous characters such as angle brackets, quotes, and script tags. Implementing proper HTML escaping before rendering any user-supplied content ensures that malicious scripts cannot execute in the browser context. Additionally, organizations should deploy Content Security Policy (CSP) headers to further limit the execution of unauthorized scripts and establish proper input validation routines that reject or sanitize data containing known malicious patterns. The vulnerability also underscores the importance of regular security audits and input validation testing as recommended by NIST cybersecurity guidelines, particularly emphasizing the need for comprehensive testing of all user-facing application interfaces to prevent similar injection vulnerabilities from persisting in web applications.