CVE-2015-4384 in Ubercart Webform Checkout Pane Module
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Ubercart Webform Checkout Pane module 6.x-3.x before 6.x-3.10 and 7.x-3.x before 7.x-3.11 for Drupal allows remote authenticated users with certain permissions to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 04/07/2019
The CVE-2015-4384 vulnerability represents a critical cross-site scripting flaw within the Ubercart Webform Checkout Pane module for Drupal platforms, affecting versions 6.x-3.x through 6.x-3.9 and 7.x-3.x through 7.x-3.10. This vulnerability specifically targets authenticated users who possess certain permissions within the Drupal environment, creating a significant security risk that can be exploited by malicious actors to execute arbitrary web scripts or HTML code. The vulnerability stems from inadequate input validation and output encoding mechanisms within the checkout pane functionality, which processes user-submitted data during the webform checkout process.
The technical exploitation of this vulnerability occurs through unspecified vectors that likely involve manipulation of form fields or checkout parameters within the Ubercart module's webform checkout pane. Attackers with authenticated access and appropriate permissions can craft malicious input that bypasses the system's sanitization routines, allowing their payloads to be executed in the context of other users' browsers. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting vulnerabilities where untrusted data is improperly handled during web application output generation. The flaw represents a classic case of insufficient output escaping where user-controllable data flows directly into HTML contexts without proper sanitization, creating a persistent threat that can be leveraged for session hijacking, data theft, or further exploitation of the affected Drupal installation.
The operational impact of CVE-2015-4384 extends beyond simple script injection, as authenticated users with sufficient privileges can potentially escalate their access within the web application. This vulnerability enables attackers to manipulate the checkout process, potentially redirecting users to malicious sites, stealing sensitive information, or modifying transaction data. The risk is particularly severe in e-commerce environments where Ubercart modules are deployed, as the checkout process handles sensitive financial and personal information. According to ATT&CK framework category T1059.001, this vulnerability enables code injection techniques that can be used to establish persistent access or execute malicious commands within the victim's browser context. The vulnerability's impact is amplified by the fact that it requires only authentication, not privileged access, making it accessible to any user with legitimate access to the Drupal system who has permissions related to checkout functionality.
Mitigation strategies for CVE-2015-4384 should prioritize immediate patching of affected versions to 6.x-3.10 and 7.x-3.11, as these releases contain the necessary security fixes. Organizations should also implement additional defensive measures including input validation at multiple layers, enhanced output encoding for all user-controllable data, and regular security audits of webform configurations. The implementation of Content Security Policy headers can provide additional protection against script execution, while monitoring for unusual checkout activities can help detect exploitation attempts. Security teams should also consider implementing web application firewalls to filter suspicious requests and maintain comprehensive logging of checkout transactions for forensic analysis. The vulnerability underscores the importance of keeping third-party modules updated and following security best practices for input handling, particularly within e-commerce platforms where user data integrity is paramount.