CVE-2021-4361 in JobSearch WP Job Board Plugin
Summary
by MITRE • 06/07/2023
The JobSearch WP Job Board plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on the jobsearch_job_integrations_settin_save AJAX action in versions up to, and including, 1.8.1. This makes it possible for authenticated attackers to update arbitrary options on the site.
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Analysis
by VulDB Data Team • 04/09/2026
The CVE-2021-4361 vulnerability affects the JobSearch WP Job Board plugin for WordPress, representing a critical authorization bypass flaw that undermines the security model of the affected platform. This vulnerability exists within the plugin's AJAX handling mechanism and specifically targets the jobsearch_job_integrations_settin_save endpoint, which is designed to manage integration settings for job board functionalities. The flaw allows authenticated attackers to exploit a missing capability check, effectively bypassing the intended access controls that should restrict administrative operations to authorized users only.
The technical implementation of this vulnerability stems from insufficient input validation and access control mechanisms within the plugin's backend processing. When an authenticated user submits a request to the jobsearch_job_integrations_settin_save AJAX action, the plugin fails to verify whether the requesting user possesses the necessary administrative privileges to modify core system settings. This missing capability check creates a direct pathway for attackers who have gained access to any valid user account to escalate their privileges and manipulate critical configuration options. The vulnerability is particularly dangerous because it operates at the administrative level, allowing attackers to modify settings that could fundamentally alter the behavior and security posture of the WordPress installation.
The operational impact of this authorization bypass vulnerability extends beyond simple privilege escalation, as it enables attackers to modify arbitrary options within the WordPress system. This capability can lead to severe consequences including but not limited to the modification of core plugin configurations, alteration of user permissions, potential data exfiltration through integration settings, and the possible installation of malicious code through compromised integration points. Attackers could leverage this vulnerability to disable security plugins, modify database connection settings, or manipulate job posting functionalities to redirect traffic to malicious sites. The implications are particularly concerning for organizations that rely heavily on job board functionalities for recruitment processes, as these systems often contain sensitive candidate information and business-critical data.
Security professionals should consider this vulnerability in the context of broader ATT&CK framework categories including privilege escalation and defense evasion techniques. The missing capability check aligns with CWE-284, which describes improper access control vulnerabilities, and represents a classic example of insufficient authorization checks in web applications. Organizations should prioritize immediate patching of affected versions, specifically targeting plugin versions 1.8.1 and earlier, as the vulnerability exists in the core functionality of the plugin's administrative interface. Additionally, implementing network-level monitoring for unusual AJAX requests and conducting thorough access control reviews can help detect and prevent exploitation attempts. The vulnerability also highlights the importance of regular security audits and the need for robust capability validation mechanisms in WordPress plugin development to prevent similar issues from occurring in other third-party components.