CVE-2023-51417 in JVM Gutenberg Rich Text Icons Plugin
Summary
by MITRE • 12/29/2023
Unrestricted Upload of File with Dangerous Type vulnerability in Joris van Montfort JVM Gutenberg Rich Text Icons.This issue affects JVM Gutenberg Rich Text Icons: from n/a through 1.2.3.
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Analysis
by VulDB Data Team • 01/21/2024
The CVE-2023-51417 vulnerability represents a critical security flaw in the JVM Gutenberg Rich Text Icons plugin, specifically targeting the file upload functionality within the Gutenberg editor environment. This vulnerability falls under the category of unrestricted file upload, a common yet severe class of security issues that can lead to complete system compromise. The affected version range spans from the initial release through version 1.2.3, indicating that this flaw has persisted across multiple iterations of the plugin, suggesting poor security practices during development and testing phases. The vulnerability is particularly concerning because it allows malicious actors to upload files with dangerous types that can execute code on the target system, potentially leading to unauthorized access, data breaches, and complete system control.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the plugin's file upload mechanism. When users attempt to upload icons or media files through the Gutenberg editor interface, the plugin fails to properly verify the file types, content, or extensions before storing them on the server. This lack of proper validation creates an attack surface where adversaries can upload malicious files such as php, aspx, or other executable scripts that can be executed by the web server. The vulnerability is classified as CWE-434, which specifically addresses the unrestricted upload of files with dangerous types, making it a well-documented and dangerous security weakness. Attackers can leverage this flaw by crafting malicious files with extensions that bypass basic checks or by exploiting the plugin's handling of file metadata to execute code directly on the WordPress installation.
The operational impact of this vulnerability extends far beyond simple data corruption or minor service disruption. Once an attacker successfully exploits this vulnerability, they gain the ability to execute arbitrary code on the target server, potentially leading to complete system compromise. This can result in unauthorized access to sensitive data, modification of website content, installation of backdoors, and use of the compromised system as a launchpad for further attacks within the network. The vulnerability particularly affects WordPress installations that utilize the Gutenberg editor, which is now the default editor for most modern WordPress sites, amplifying the potential attack surface. From an attacker's perspective, this vulnerability maps directly to ATT&CK technique T1505.003, which involves the use of web shells for maintaining persistence and executing commands on compromised systems, making it a prime target for exploitation in automated attack campaigns.
Mitigation strategies for CVE-2023-51417 must address both immediate remediation and long-term security improvements. The most critical step is to upgrade to the patched version of the JVM Gutenberg Rich Text Icons plugin, which should include proper file type validation, content checking, and restricted upload directories. Organizations should implement strict file validation mechanisms that verify not only file extensions but also file content signatures to prevent the upload of executable files. The plugin should be configured to store uploaded files outside the web root directory, and proper file permissions should be enforced to prevent execution of uploaded content. Additionally, security headers should be implemented to prevent direct execution of uploaded files, and regular security audits should be conducted to identify similar vulnerabilities in other plugins or themes. Network monitoring should be enhanced to detect unusual file upload patterns that might indicate exploitation attempts, and access controls should be tightened to limit who can upload files through the Gutenberg interface. These measures align with the principle of defense in depth and help ensure that even if one layer of security fails, other controls can prevent or detect malicious activity.