CVE-2023-29437 in Connections Business Directory Plugin
Summary
by MITRE • 06/26/2023
Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in Steven A. Zahm Connections Business Directory plugin <= 10.4.36 versions.
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Analysis
by VulDB Data Team • 07/18/2023
The CVE-2023-29437 vulnerability represents a stored cross-site scripting flaw within the Steven A. Zahm Connections Business Directory plugin for WordPress, affecting versions up to and including 10.4.36. This security weakness resides in the plugin's authentication handling mechanisms and allows authenticated users with contributor level privileges or higher to inject malicious scripts into the application's data storage layer. The vulnerability stems from inadequate input validation and output escaping of user-supplied data within the plugin's business directory functionality, creating an environment where malicious payloads can persist and execute when other users interact with the compromised data.
The technical implementation of this vulnerability involves the plugin's failure to properly sanitize and escape user-contributed content before storing it in the database and subsequently rendering it on web pages. When contributors or higher-privileged users submit business directory entries containing malicious script code, the plugin stores this content without adequate sanitization. Subsequent page loads that display these entries fail to properly escape the stored content, allowing the malicious scripts to execute within the context of other users' browsers. This stored nature of the vulnerability means that the malicious payload persists even after the initial submission, making it particularly dangerous as it can affect multiple users over extended periods.
The operational impact of CVE-2023-29437 extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, and data exfiltration. An attacker with contributor privileges could potentially inject scripts that steal administrator cookies, redirect users to malicious sites, or manipulate the application's functionality. The vulnerability's classification as a stored XSS issue places it under CWE-79 - Improper Neutralization of Input During Web Page Generation, which is a fundamental weakness in web application security. This weakness is particularly concerning in the context of WordPress plugins as it can provide attackers with persistent access to compromised sites, especially when the plugin is used in business directory contexts where multiple users contribute content.
The attack surface for this vulnerability is significant given the widespread use of WordPress and the business directory plugin. The fact that it affects users with contributor privileges or higher means that even relatively low-privilege accounts can potentially compromise the application's security. This aligns with ATT&CK technique T1078.004 - Valid Accounts: Cloud Accounts, as attackers could leverage compromised contributor accounts to maintain persistent access. Organizations using this plugin should consider implementing additional access controls, monitoring for unusual content submissions, and conducting regular security audits of user-contributed content. The vulnerability also highlights the importance of proper input validation and output escaping practices, which are fundamental requirements in secure coding standards and directly relate to the OWASP Top Ten security risks.
Mitigation strategies for CVE-2023-29437 should include immediate patching of the affected plugin to version 10.4.37 or later, which contains the necessary security fixes. Organizations should also implement content filtering mechanisms to sanitize user submissions, enforce strict input validation on all user-contributed data, and monitor for suspicious content patterns. Additionally, administrators should consider implementing web application firewalls and security monitoring solutions that can detect and prevent XSS attack patterns. The vulnerability underscores the critical need for regular security updates and the importance of maintaining current versions of all WordPress plugins to prevent exploitation of known vulnerabilities.