CVE-2026-115958 in Discussion Board Plugin
Summary
by MITRE • 10/26/2026
Missing Authorization vulnerability in WP Discussion Board WP Discussion Board wp-discussion-board allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Discussion Board: from n/a through 2.6.0.
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Analysis
by VulDB Data Team • 10/26/2026
The identified security flaw within the WP Discussion Board plugin, specifically affecting versions up to and including 2.6.0, represents a critical failure in access control mechanisms that governs user interactions on WordPress-based websites. This vulnerability is classified as an Incorrectly Configured Access Control Security Level issue, which fundamentally undermines the integrity of role-based permissions intended by the application architecture. In standard web applications, authorization checks are designed to ensure that users can only perform actions and access resources for which they have explicit permission. However, in this specific implementation, the plugin fails to adequately verify whether a requesting user possesses the necessary privileges before processing sensitive requests or modifying data structures associated with discussion threads, comments, or administrative settings.
From a technical perspective, the root cause lies in the absence of robust server-side validation for authorization tokens and session states during critical API endpoints or form submissions handled by the plugin. An attacker who has authenticated as even a low-privilege user, such as a subscriber or contributor, can manipulate HTTP requests to bypass these missing checks. By crafting specific payloads that target internal functions responsible for updating discussion parameters or managing user roles, an unauthorized actor can execute actions reserved exclusively for administrators. This type of flaw is commonly associated with CWE-284 Improper Access Control and often facilitates broader attacks such as privilege escalation, where a low-level account gains elevated rights to compromise the entire WordPress installation.
The operational impact of this vulnerability extends beyond simple data manipulation within the discussion board itself. Because WordPress plugins operate within the same execution context as the core CMS, successful exploitation can lead to full site takeover if combined with other vectors or if the plugin has broad capabilities. Attackers could potentially deface the website by altering public-facing content, inject malicious scripts into discussion threads for cross-site scripting attacks against visitors, or exfiltrate sensitive user data stored in the database associated with forum activities. Furthermore, the ability to modify administrative settings without proper authorization allows attackers to disable security plugins, alter site configurations, or install additional backdoors, thereby establishing persistent access and compromising the confidentiality, integrity, and availability of the web application.
Mitigation strategies must prioritize immediate remediation through software updates and configuration hardening. The most effective solution is to upgrade WP Discussion Board to a version greater than 2.6.0 where these authorization checks have been properly implemented by the developers. In cases where an update cannot be applied immediately due to compatibility constraints, administrators should consider disabling or deactivating the plugin entirely until a secure patch is available. Additionally, implementing Web Application Firewall rules can help detect and block anomalous request patterns indicative of unauthorized access attempts targeting known vulnerable endpoints. Regular security audits and penetration testing focused on role-based access control are also recommended to identify similar misconfigurations across other installed plugins, ensuring that the principle of least privilege is strictly enforced throughout the application environment. This approach aligns with industry standards such as OWASP Top 10 categories related to broken access control and supports adherence to ATT&CK techniques involving unauthorized account manipulation or lateral movement within compromised environments.