CVE-2012-4874 in Another WordPress Classifieds Plugin
Summary
by MITRE
Unspecified vulnerability in the Another WordPress Classifieds Plugin before 2.0 for WordPress has unknown impact and attack vectors related to "image uploads."
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 01/15/2018
The vulnerability identified as CVE-2012-4874 affects the Another WordPress Classifieds Plugin version 1.9 and earlier, representing a critical security flaw in the WordPress ecosystem that could potentially allow unauthorized users to execute malicious code on vulnerable systems. This vulnerability specifically relates to image upload functionality within the classifieds plugin, which is commonly used for displaying advertisements and listings on WordPress websites. The unspecified nature of the vulnerability's impact and attack vectors suggests that the flaw may have multiple exploitation pathways or that the full scope of the vulnerability was not initially disclosed in the CVE database. Given that this vulnerability exists in a plugin that handles user-generated content through image uploads, it presents a significant risk to WordPress installations that rely on classified advertising features.
The technical implementation of the image upload functionality in the affected plugin version likely lacks proper input validation, sanitization, or access control mechanisms that would normally prevent malicious file uploads. This flaw could potentially allow attackers to upload malicious files such as web shells, php scripts, or other executable content that would execute with the privileges of the web server. The vulnerability may stem from insufficient file type checking, inadequate file extension validation, or improper handling of uploaded files that could bypass security measures designed to prevent the execution of potentially harmful code. Attackers could exploit this weakness to gain unauthorized access to the affected WordPress installation, potentially leading to complete system compromise. The vulnerability aligns with CWE-434 which describes insecure file upload vulnerabilities where the system does not properly validate or restrict file uploads, and could map to ATT&CK technique T1190 for unauthorized access through web shell deployment.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as successful exploitation could result in persistent backdoor access, data exfiltration, or the use of compromised systems for further attacks. WordPress sites utilizing the affected plugin would be at risk of becoming part of botnet networks, serving as launch points for attacks against other systems, or experiencing complete compromise where attacker-controlled code executes indefinitely. The vulnerability affects not just the immediate WordPress installation but could potentially impact the broader network infrastructure if the compromised site serves as a gateway to internal systems. Organizations relying on classified advertising functionality within WordPress environments would face significant risk of reputational damage, regulatory compliance violations, and financial losses due to potential data breaches or service disruption. The exploitation of this vulnerability could also lead to the installation of additional malicious software or the modification of existing website content without administrator knowledge.
Mitigation strategies for this vulnerability should focus on immediate plugin updates to version 2.0 or later, which would contain the necessary security patches to address the image upload flaw. System administrators should implement comprehensive file upload restrictions including MIME type validation, file extension filtering, and the use of randomized file names to prevent predictable file paths. Additional protective measures include restricting upload permissions to specific user roles, implementing proper file upload directory permissions, and monitoring for suspicious file uploads. Organizations should also consider implementing web application firewalls to detect and block malicious upload attempts, as well as regular security audits of installed plugins to ensure all components are up to date with the latest security patches. The vulnerability demonstrates the critical importance of keeping all WordPress plugins updated and following secure coding practices that validate and sanitize all user inputs, particularly when handling file uploads in web applications.