CVE-2022-29429 in Code Snippets Extended Plugin
Summary
by MITRE • 05/17/2022
Remote Code Execution (RCE) in Alexander Stokmann's Code Snippets Extended plugin
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Analysis
by VulDB Data Team • 05/28/2022
The vulnerability CVE-2022-29429 represents a critical remote code execution flaw discovered in Alexander Stokmann's Code Snippets Extended WordPress plugin. This vulnerability exists within the plugin's handling of user-supplied input that is not properly sanitized or validated before being processed. The flaw allows an attacker to execute arbitrary code on the target system with the privileges of the web server, potentially leading to complete system compromise. The vulnerability specifically affects versions of the plugin prior to 2.2.3, making it a significant concern for WordPress administrators who have not updated their installations. The attack vector involves sending malicious input through specific parameters that are processed by the plugin's code execution mechanisms.
The technical implementation of this vulnerability stems from improper input validation and sanitization practices within the plugin's core functionality. When the plugin processes user-provided data, it fails to adequately filter or escape special characters that could be interpreted as executable commands. This creates a path for attackers to inject malicious code that gets executed within the context of the web server process. The vulnerability is classified as a command injection flaw, which aligns with CWE-77 and CWE-94 categories that deal with improper input handling and code execution vulnerabilities. Attackers can exploit this by crafting specific payloads that bypass the plugin's security measures and execute arbitrary commands on the target server. The flaw demonstrates poor secure coding practices and inadequate defense-in-depth mechanisms within the plugin's architecture.
The operational impact of CVE-2022-29429 extends far beyond simple data compromise, as it provides attackers with complete control over affected systems. Successful exploitation can lead to data theft, system modification, installation of additional malware, and establishment of persistent backdoors. The vulnerability affects WordPress installations where the Code Snippets Extended plugin is active, potentially exposing thousands of websites to automated attacks. Attackers can leverage this vulnerability to perform reconnaissance activities, escalate privileges, and move laterally within network environments. The remote nature of the vulnerability means that attackers do not require physical access to the target system, making it particularly dangerous for web applications that are publicly accessible. Organizations may face regulatory compliance issues and reputational damage if their systems are compromised through this vulnerability.
Mitigation strategies for CVE-2022-29429 primarily focus on immediate remediation through plugin updates to version 2.2.3 or later, which contain the necessary patches to address the input validation flaws. System administrators should conduct thorough inventory checks to identify all affected installations and prioritize immediate updates across their infrastructure. Additional protective measures include implementing web application firewalls that can detect and block malicious payloads targeting this specific vulnerability, applying principle of least privilege configurations for web server accounts, and monitoring system logs for suspicious activities that may indicate exploitation attempts. Network segmentation and intrusion detection systems should be configured to alert on unusual outbound connections that might result from successful exploitation. Organizations should also consider implementing automated patch management processes to ensure timely deployment of security updates across all systems. The vulnerability highlights the importance of regular security audits and the need for maintaining up-to-date software components to prevent exploitation through known vulnerabilities, aligning with ATT&CK technique T1059 for command and scripting interpreter usage.