CVE-2023-2178 in Aajoda Testimonials Plugin
Summary
by MITRE • 06/27/2023
The Aajoda Testimonials WordPress plugin before 2.2.2 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup).
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 07/05/2023
The CVE-2023-2178 vulnerability affects the Aajoda Testimonials WordPress plugin version 2.2.1 and earlier, representing a critical stored cross-site scripting flaw that undermines web application security. This vulnerability specifically targets the plugin's handling of user settings where insufficient sanitization and escaping mechanisms are implemented, creating a persistent security risk that can be exploited by authenticated users with administrative privileges. The flaw occurs within the plugin's configuration management system where user inputs are not properly validated or escaped before being stored and subsequently rendered back to users, enabling attackers to inject malicious scripts that persist in the database and execute whenever the affected page is accessed.
The technical exploitation of this vulnerability hinges on the plugin's failure to implement proper input validation and output escaping mechanisms as mandated by security best practices. According to CWE-79, the underlying weakness corresponds to Cross-Site Scripting vulnerabilities that arise from insufficient sanitization of user-provided data. The vulnerability is particularly concerning because it affects high-privilege users who typically possess the ability to modify plugin settings, yet the flaw allows these users to inject malicious payloads that can execute in the context of other users' browsers. The attack vector involves an authenticated administrator or user with sufficient privileges to modify the plugin's testimonial settings, where the malicious script code gets stored in the database and subsequently executed when the testimonials are displayed on the website.
The operational impact of CVE-2023-2178 extends beyond simple script execution, as it can enable attackers to perform various malicious activities including credential theft, session hijacking, and redirection to malicious websites. In a multisite WordPress environment where the unfiltered_html capability is explicitly restricted, the vulnerability becomes even more dangerous as it bypasses the intended security controls that normally prevent untrusted users from injecting potentially harmful content. The stored nature of the XSS attack means that once the malicious script is injected, it will persistently affect all users who view the affected testimonial pages without requiring additional user interaction, making it particularly effective for long-term attacks. This vulnerability aligns with ATT&CK technique T1566.001, which covers social engineering through malicious content injection, and represents a significant risk to website integrity and user security.
Mitigation strategies for CVE-2023-2178 should prioritize immediate plugin updates to version 2.2.2 or later, which contain the necessary sanitization and escaping fixes. Organizations should also implement additional security measures including regular security audits of WordPress plugins, monitoring of user activities within administrative interfaces, and implementation of Content Security Policy headers to limit the impact of potential XSS exploits. The vulnerability demonstrates the importance of proper input validation and output escaping as outlined in OWASP Top Ten security practices, particularly in the context of WordPress plugin development where third-party components can introduce significant security risks. Security teams should also consider implementing web application firewalls and regular penetration testing to identify similar vulnerabilities in other plugins or custom code components that may not properly sanitize user inputs before storage or rendering.