CVE-2012-6682 in vBDownloads Module
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in downloads/actions/editdownload.php in the DragonByte Technologies vBDownloads module 1.3.2 and earlier for vBulletin allows remote attackers to inject arbitrary web script or HTML via the mirrors[] parameter.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 01/29/2021
The CVE-2012-6682 vulnerability represents a critical cross-site scripting flaw within the DragonByte Technologies vBDownloads module version 1.3.2 and earlier for vBulletin platforms. This vulnerability specifically affects the downloads/actions/editdownload.php script, which serves as a key component in managing download operations within the vBulletin forum ecosystem. The flaw arises from insufficient input validation and sanitization mechanisms that fail to properly handle user-supplied data, creating an exploitable entry point for malicious actors seeking to compromise forum users.
The technical exploitation of this vulnerability occurs through the mirrors[] parameter, which is designed to accept mirror server information for download files. Attackers can craft malicious payloads containing JavaScript code or HTML elements and inject them into this parameter during the download editing process. When the vulnerable script processes this input without proper sanitization, the injected code becomes permanently stored within the forum's database and subsequently executed whenever legitimate users view the download information page. This creates a persistent XSS vector that can be leveraged for session hijacking, credential theft, or redirection to malicious sites.
From an operational impact perspective, this vulnerability poses significant risks to vBulletin forum administrators and their user communities. The persistent nature of the XSS attack means that once exploited, malicious scripts remain active until manually removed by administrators, potentially affecting all users who access the compromised download information. The attack can be executed remotely without requiring authentication, making it particularly dangerous as it allows attackers to compromise forum users' sessions and potentially escalate privileges within the forum environment. The vulnerability also violates fundamental web security principles and can lead to complete compromise of user accounts and forum integrity.
Security professionals should note that this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications. The ATT&CK framework categorizes this as a web application attack vector under the technique of "Cross-Site Scripting" with potential for privilege escalation and credential harvesting. Organizations should implement immediate mitigations including upgrading to the patched version of the vBDownloads module, implementing input validation and output encoding mechanisms, and conducting thorough security audits of all third-party vBulletin plugins. Additionally, administrators should consider implementing content security policies and monitoring for suspicious user activity patterns that may indicate exploitation attempts. The vulnerability serves as a reminder of the critical importance of input validation and proper sanitization in web applications, particularly in forum platforms where user-generated content is prevalent and security controls must be robust against various attack vectors.