CVE-2024-8126 in Advanced File Manager Plugin
Summary
by MITRE • 09/26/2024
The Advanced File Manager plugin for WordPress is vulnerable to arbitrary file uploads via the 'class_fma_connector.php' file in all versions up to, and including, 5.2.8. This makes it possible for authenticated attackers, with Subscriber-level access and above, and granted permissions by an Administrator, to upload a new .htaccess file allowing them to subsequently upload arbitrary files on the affected site's server which may make remote code execution possible.
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Analysis
by VulDB Data Team • 10/01/2024
The vulnerability identified as CVE-2024-8126 affects the Advanced File Manager plugin for WordPress, specifically targeting versions up to and including 5.2.8. This represents a critical security flaw that undermines the integrity of WordPress installations by enabling unauthorized file operations through a legitimate plugin component. The vulnerability resides within the 'class_fma_connector.php' file, which serves as a core communication interface for file management operations within the plugin's architecture.
The technical implementation of this vulnerability stems from insufficient input validation and access control mechanisms within the file upload functionality. Attackers with subscriber-level privileges or higher can exploit this weakness to upload malicious files, particularly leveraging the ability to create .htaccess files that modify server configuration. This creates a dangerous escalation path where initial limited access can be leveraged to gain broader system control. The flaw operates under CWE-434, which categorizes insecure file upload vulnerabilities that allow attackers to upload executable files or scripts.
The operational impact of this vulnerability extends far beyond simple file manipulation, as it provides a pathway for potential remote code execution on the affected WordPress server. Once an attacker successfully uploads a .htaccess file, they can subsequently upload additional malicious files that may include web shells, backdoors, or other exploit payloads. This vulnerability directly maps to ATT&CK technique T1190, which describes the exploitation of vulnerabilities in web applications to achieve initial access and persistence. The attack vector requires only authenticated access, making it particularly dangerous as it can be exploited by insiders or compromised user accounts.
The security implications of this vulnerability are severe and multifaceted, as it allows attackers to establish persistent access to the affected WordPress installation. The ability to upload arbitrary files through the plugin's interface means that attackers can potentially deploy malware, steal sensitive data, or use the compromised server for further attacks against other systems. This vulnerability undermines the principle of least privilege and demonstrates how a single flawed plugin can compromise entire WordPress installations. Organizations using the Advanced File Manager plugin must immediately assess their exposure and implement appropriate mitigations to prevent exploitation. The vulnerability highlights the critical importance of regular plugin updates and security audits to prevent such persistent threats from compromising web infrastructure.