CVE-2022-3418 in Import any XML or CSV File Plugin
Summary
by MITRE • 11/07/2022
The Import any XML or CSV File to WordPress plugin before 3.6.9 is not properly filtering which file extensions are allowed to be imported on the server, which could allow administrators in multi-site WordPress installations to upload arbitrary files
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 05/02/2025
The vulnerability identified as CVE-2022-3418 affects the Import any XML or CSV File to WordPress plugin version 3.6.8 and earlier, presenting a critical security flaw in WordPress multi-site installations. This issue stems from insufficient validation of file extensions during the import process, creating a pathway for unauthorized file uploads that could compromise the entire WordPress network. The vulnerability specifically targets the plugin's file validation mechanism, which fails to properly restrict which file types can be imported into the system, allowing malicious actors to potentially upload malicious files with dangerous extensions.
The technical flaw manifests in the plugin's improper handling of file extension validation, where the system does not adequately filter or sanitize the file types permitted for import operations. This weakness enables attackers to bypass the intended security controls by uploading files with extensions that should be restricted, potentially including executable files, scripts, or other malicious content that could be executed within the WordPress environment. The vulnerability becomes particularly dangerous in multi-site WordPress installations where a compromised site could potentially affect the entire network, as the attack surface expands beyond individual site boundaries. This type of vulnerability aligns with CWE-434, which describes the improper restriction of file uploads, and represents a classic example of insufficient input validation in web applications.
The operational impact of this vulnerability extends beyond simple file upload capabilities, as it creates potential pathways for remote code execution, privilege escalation, and persistent malware installation within the WordPress environment. Administrators who are tricked into importing malicious files could inadvertently grant attackers persistent access to their sites, potentially leading to full system compromise. The vulnerability's exploitation requires an administrator to perform the import action, making social engineering a potential attack vector, but once exploited, the consequences could be severe including data theft, site defacement, and use of compromised systems for further attacks. The impact is amplified in multi-site environments where a single compromised site could serve as a foothold for attacking other sites within the same network.
Mitigation strategies for CVE-2022-3418 should prioritize immediate plugin updates to version 3.6.9 or later, which contains the necessary fixes for proper file extension filtering. Organizations should implement additional security measures including restrictive file upload policies, mandatory file type validation at multiple levels, and regular security audits of installed plugins and themes. Network segmentation and monitoring should be enhanced to detect unusual file upload activities, while administrators should be trained to recognize potential social engineering attempts that might exploit this vulnerability. The fix addresses the core issue by implementing proper file extension validation and sanitization, ensuring that only approved file types can be imported through the plugin interface. Security teams should also consider implementing web application firewalls and content delivery network protections to monitor and block suspicious file upload attempts, aligning with ATT&CK technique T1195.001 for operating system binary proxies and T1078.004 for valid accounts to prevent unauthorized access to administrative functions.