CVE-2007-4071 in Webbler CMS
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in uploader/index.php in Webbler CMS before 3.1.6 allow remote attackers to inject arbitrary web script or HTML via the (1) page or (2) login parameter.
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Analysis
by VulDB Data Team • 08/12/2017
The vulnerability identified as CVE-2007-4071 represents a critical cross-site scripting flaw in the Webbler CMS software ecosystem, specifically within the uploader/index.php component. This vulnerability affects versions prior to 3.1.6 and exposes the system to malicious injection attacks that can compromise user sessions and data integrity. The flaw manifests through two primary attack vectors where the page and login parameters become entry points for malicious code execution. The vulnerability classification aligns with CWE-79 which defines cross-site scripting as a weakness where untrusted data is incorporated into web page content without proper validation or encoding, creating opportunities for attackers to execute arbitrary scripts in the context of the victim's browser.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the Webbler CMS upload handler. When users submit requests containing malicious payloads through the page or login parameters, the application fails to properly filter or encode these inputs before processing them. This allows attackers to inject HTML content or JavaScript code that executes in the browser context of legitimate users who access the affected pages. The vulnerability operates at the application layer and leverages the trust relationship between the web application and its users, making it particularly dangerous as it can be exploited without requiring authentication or special privileges. The attack surface expands significantly when considering that the upload functionality often serves as a gateway for additional malicious activities within web applications.
The operational impact of CVE-2007-4071 extends beyond simple script injection, creating potential pathways for more sophisticated attacks that can compromise user accounts and sensitive data. Attackers can leverage this vulnerability to steal session cookies, redirect users to malicious sites, deface web pages, or harvest user credentials through credential harvesting scripts. The vulnerability also creates opportunities for privilege escalation attacks where malicious users might gain unauthorized access to administrative functions. According to ATT&CK framework, this vulnerability maps to T1059.007 for scripting and T1566 for credential harvesting, demonstrating how a single XSS vulnerability can enable multiple attack vectors. The impact is particularly severe in environments where the CMS serves as a foundation for multiple web applications or contains sensitive user data, as a successful exploitation could lead to complete system compromise.
Mitigation strategies for CVE-2007-4071 require immediate implementation of input validation and output encoding measures. Organizations should upgrade to Webbler CMS version 3.1.6 or later, which contains the necessary patches to address the vulnerability. Additionally, implementing proper parameter validation through regular expressions and whitelisting techniques can prevent malicious payloads from being processed. The application should enforce strict output encoding, particularly when rendering user-supplied data in web pages, to neutralize potential script injection attempts. Security headers such as Content Security Policy should be implemented to further restrict script execution and prevent unauthorized code injection. Network-based mitigations including web application firewalls and intrusion detection systems can provide additional layers of protection, though these should complement rather than replace proper application-level fixes. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other components of the web application stack, ensuring comprehensive protection against similar cross-site scripting threats.