CVE-2022-40206 in Forum Plugin
Summary
by MITRE • 11/08/2022
Insecure direct object references (IDOR) vulnerability in the wpForo Forum plugin <= 2.0.5 on WordPress allows attackers with subscriber or higher user roles to mark any forum post as private/public.
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Analysis
by VulDB Data Team • 02/21/2025
The CVE-2022-40206 vulnerability represents a critical insecure direct object reference flaw within the wpForo Forum plugin version 2.0.5 and earlier, affecting WordPress installations. This vulnerability exposes a fundamental weakness in the plugin's access control mechanisms, allowing authenticated attackers with subscriber privileges or higher to manipulate forum post visibility settings. The flaw stems from inadequate input validation and authorization checks within the plugin's administrative functions, specifically in how it handles post status modifications. Attackers can exploit this vulnerability to elevate their privileges by marking any forum post as private or public, effectively bypassing the intended access controls that should restrict such modifications to authorized administrators or moderators.
The technical implementation of this vulnerability occurs within the wpForo plugin's post management functionality where direct object references are used without proper authorization verification. When users with subscriber roles or higher attempt to modify post visibility, the plugin fails to validate whether the requesting user has legitimate authorization to perform such actions on the specific post object. This creates a pathway for privilege escalation where unauthorized users can manipulate forum post attributes, potentially exposing private content or hiding public posts. The vulnerability manifests as a lack of proper access control checks that should validate user permissions against specific object identifiers, a common pattern identified in CWE-284 access control flaws. This weakness directly maps to the ATT&CK technique T1078 legitimate credentials, as attackers can leverage existing user accounts to perform unauthorized actions within the forum system.
The operational impact of this vulnerability extends beyond simple privilege escalation, creating potential security risks for forum administrators and content owners. Attackers can exploit this vulnerability to hide sensitive discussions, manipulate forum content visibility, or potentially disrupt normal forum operations by marking posts as private when they should remain public. The vulnerability affects all forum posts within the wpForo plugin, making it particularly dangerous in environments where forum content management is critical for business operations. Organizations using vulnerable versions of wpForo may experience data exposure issues, content manipulation, and potential compliance violations depending on the nature of the forum discussions. The vulnerability also increases the attack surface for more sophisticated attacks, as it provides a foothold for attackers to further compromise the WordPress installation or escalate privileges to higher administrative levels.
Mitigation strategies for CVE-2022-40206 require immediate action including upgrading to wpForo plugin version 2.0.6 or later, which contains the necessary access control patches. System administrators should also implement network segmentation and monitoring to detect unauthorized access attempts to forum management functions. Regular security audits of WordPress plugins should include verification of access control mechanisms and proper authorization checks. The vulnerability highlights the importance of proper input validation and access control implementation, aligning with security best practices outlined in the OWASP Top Ten and NIST cybersecurity frameworks. Additionally, implementing role-based access controls and regular privilege reviews can help minimize the impact of such vulnerabilities, ensuring that only authorized personnel have access to critical forum management functions. Organizations should also consider implementing web application firewalls and security monitoring solutions to detect and prevent exploitation attempts of similar insecure direct object reference vulnerabilities.