CVE-2022-0780 in SearchIQ Plugin
Summary
by MITRE • 04/18/2022
The SearchIQ WordPress plugin before 3.9 contains a flag to disable the verification of CSRF nonces, granting unauthenticated attackers access to the siq_ajax AJAX action and allowing them to perform Cross-Site Scripting attacks due to the lack of sanitisation and escaping in the customCss parameter
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Analysis
by VulDB Data Team • 04/21/2022
The CVE-2022-0780 vulnerability resides within the SearchIQ WordPress plugin version 3.8 and earlier, representing a critical security flaw that undermines the plugin's defensive mechanisms. This vulnerability stems from a deliberate configuration flag that disables Cross-Site Request Forgery nonce verification, creating an exploitable entry point for unauthenticated attackers. The flaw specifically affects the siq_ajax AJAX action endpoint, which serves as a communication interface between the frontend and backend systems. The security implications extend beyond simple access control, as the vulnerability creates a pathway for malicious actors to inject and execute arbitrary JavaScript code within the context of authenticated users' browsers.
The technical exploitation of this vulnerability occurs through the customCss parameter within the siq_ajax AJAX action, which fails to implement proper sanitization and output escaping mechanisms. This parameter accepts user-supplied input without adequate validation or encoding, creating a classic cross-site scripting vulnerability. Attackers can craft malicious payloads that, when processed by the vulnerable plugin, execute in the browser context of any user who views the affected content. The absence of input sanitization and output escaping directly violates fundamental web security principles and creates a persistent threat vector that can be leveraged for session hijacking, data theft, or further exploitation of the compromised WordPress installation.
The operational impact of CVE-2022-0780 extends beyond immediate XSS execution, as it enables attackers to perform broader reconnaissance and attack chain progression within compromised environments. This vulnerability aligns with CWE-79, which describes cross-site scripting flaws, and represents a direct violation of the principle of least privilege by allowing unauthenticated access to administrative functions. The attack surface becomes particularly dangerous when considering that WordPress installations often contain sensitive data and administrative capabilities that can be leveraged for privilege escalation. The vulnerability also intersects with ATT&CK techniques related to command and control, credential access, and privilege escalation through web application exploitation, making it a significant concern for organizations relying on WordPress for their digital presence.
Organizations should immediately implement mitigation strategies including upgrading to SearchIQ plugin version 3.9 or later, where the CSRF nonce verification has been restored and proper input sanitization has been implemented. Network-based mitigations such as web application firewalls can provide additional protection by filtering malicious payloads before they reach the vulnerable endpoint. Security monitoring should focus on identifying unusual AJAX requests to siq_ajax endpoints and anomalous patterns in customCss parameter usage. The vulnerability demonstrates the critical importance of maintaining up-to-date software components and implementing proper input validation at all levels of application processing, as the absence of even basic security controls can create persistent threats that compromise entire WordPress installations and their associated user data.