CVE-2022-1598 in WPQA Builder Plugin
Summary
by MITRE • 06/08/2022
The WPQA Builder WordPress plugin before 5.4 which is a companion to the Discy and Himer , lacks authentication in a REST API endpoint, allowing unauthenticated users to discover private questions sent between users on the site.
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Analysis
by VulDB Data Team • 06/10/2022
The WPQA Builder WordPress plugin vulnerability CVE-2022-1598 represents a critical authentication flaw that undermines the security of user communication within WordPress environments. This vulnerability specifically affects versions prior to 5.4 of the WPQA Builder plugin, which serves as a companion plugin for popular WordPress themes including Discy and Himer. The flaw exists within the plugin's REST API implementation where proper authentication mechanisms are absent, creating an unauthorized access vector that exposes sensitive user data.
The technical nature of this vulnerability stems from the absence of authentication checks on specific REST API endpoints within the WPQA Builder plugin. When users send private questions between each other on WordPress sites utilizing this plugin, the communication should remain protected and accessible only to authorized parties. However, due to the missing authentication layer, any unauthenticated user can exploit the REST API endpoint to access these private communications. This represents a direct violation of the principle of least privilege and demonstrates a fundamental flaw in the plugin's access control implementation.
The operational impact of this vulnerability extends beyond simple data exposure, as it fundamentally compromises the privacy and security of user interactions within the WordPress ecosystem. Attackers can leverage this vulnerability to discover private questions sent between users, potentially gaining access to sensitive information, personal communications, or confidential data exchanged through the platform. This creates a significant risk for users who rely on the plugin for private messaging functionality, as their communications become accessible to anyone who can make requests to the vulnerable API endpoint. The vulnerability affects not only individual users but also organizations that depend on WordPress for secure communication platforms.
From a cybersecurity perspective, this vulnerability aligns with CWE-284, which addresses improper access control in software systems, and represents a classic example of insufficient authentication mechanisms in web applications. The ATT&CK framework categorizes this as a privilege escalation technique where an attacker gains unauthorized access to restricted resources through the exploitation of authentication weaknesses. Organizations using affected versions of the WPQA Builder plugin face potential data breaches, privacy violations, and reputational damage when this vulnerability is exploited. The impact is particularly severe because it affects user-to-user private messaging systems that are expected to maintain confidentiality.
The recommended mitigation strategy involves immediate upgrading of the WPQA Builder plugin to version 5.4 or later, which contains the necessary authentication fixes. System administrators should also conduct comprehensive security assessments of their WordPress installations to identify other potentially vulnerable plugins or themes that may exhibit similar authentication flaws. Additionally, implementing network-level monitoring to detect unauthorized API access attempts can provide early warning capabilities. Organizations should also consider implementing additional security controls such as API rate limiting and enhanced access logging to minimize the impact of potential exploitation attempts. Regular security audits and vulnerability scanning of WordPress installations remain essential practices for maintaining secure configurations and preventing similar authentication bypass vulnerabilities from compromising user data privacy and system integrity.