CVE-2026-108486 in Forminator Plugin
Summary
by MITRE • 10/12/2026
Missing Authorization vulnerability in WPMU DEV Forminator forminator allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Forminator: from n/a through 1.58.0.
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Analysis
by VulDB Data Team • 10/12/2026
The identified vulnerability represents a critical failure in access control mechanisms within the WPMU DEV Forminator plugin, specifically affecting versions ranging from initial releases up to version 1.58.0. This flaw is categorized under CWE-284, which describes Improper Access Control, and aligns with MITRE ATT&CK technique T1078, Valid Accounts, as it allows an attacker to bypass intended security restrictions through misconfigured permissions rather than exploiting a code logic error in authentication itself. The core issue stems from the application's inability to properly verify whether the requesting user possesses the necessary privileges to perform specific actions on form data or configuration settings. In many WordPress environments, Forminator serves as a central hub for collecting sensitive user information, making robust authorization checks essential for maintaining data integrity and privacy compliance.
Technically, this vulnerability manifests when the plugin fails to enforce server-side validation of user roles and capabilities before processing requests related to form management. An attacker with low-privilege accounts, such as subscribers or contributors who should not have administrative access, can manipulate HTTP parameters to execute functions reserved for administrators. This typically involves crafting specific API calls or modifying POST data to trigger actions like editing form settings, viewing submitted entries from other users, or deleting forms entirely. The absence of these checks means that the application trusts client-supplied input regarding user identity and permissions without cross-referencing it against the session's actual authorized state on the server side.
The operational impact of this vulnerability is severe due to the nature of form plugins in web applications. Successful exploitation can lead to unauthorized access to personally identifiable information collected through forms, resulting in potential data breaches that violate regulations such as GDPR or CCPA. Furthermore, attackers could modify existing forms to inject malicious code into submission pages, leading to cross-site scripting attacks against end-users who fill out the forms. In more advanced scenarios, an attacker might delete critical form configurations, causing denial of service for legitimate business processes reliant on those data collection points. The lack of proper authorization also undermines audit trails and accountability, as actions are performed without verifying if they were authorized by a system administrator.
Mitigation strategies must prioritize immediate remediation through software updates. Administrators running Forminator versions prior to 1.58.0 should upgrade to the latest patched version where these access control checks have been reinforced. For environments where updating is not immediately feasible, temporary mitigations include restricting file permissions on plugin directories and implementing web application firewall rules that monitor for anomalous requests targeting form-related endpoints with non-administrator user agents or session tokens. Additionally, enforcing strict role-based access controls at the WordPress level ensures that only trusted users can interact with sensitive plugins. Regular security audits focusing on privilege escalation vectors are recommended to identify similar misconfigurations across other installed components within the CMS ecosystem.