CVE-2026-81346 in Frontend Admin Plugin
Summary
by MITRE • 08/29/2026
The Frontend Admin by DynamiApps WordPress plugin before 3.29.11 does not perform a capability check on one of its AJAX actions, allowing any authenticated user, such as a subscriber, to delete arbitrary membership plans.
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Analysis
by VulDB Data Team • 08/29/2026
The vulnerability identified in the Frontend Admin plugin for WordPress prior to version 3.29.11 represents a critical failure in access control mechanisms within the application's administrative interface. Specifically, the flaw resides in one of the AJAX endpoints responsible for managing subscription or membership plans. In secure web applications, any action that modifies state on the server side must be protected by rigorous capability checks to ensure that only users with appropriate privileges can execute it. However, this particular endpoint lacks such verification logic, effectively leaving a door open for unauthorized operations. This type of oversight is particularly dangerous because WordPress distinguishes heavily between user roles, and subscribers are typically granted minimal permissions intended solely for viewing content or basic profile management, not for administrative tasks like deleting critical configuration data.
From a technical perspective, the absence of a capability check means that an attacker with even the lowest level of authenticated access can craft specific HTTP requests to trigger the deletion process. Since WordPress AJAX handlers often rely on nonce validation and role-based checks to prevent Cross-Site Request Forgery and unauthorized actions, the missing code segment bypasses these security layers entirely. An adversary could exploit this by sending a POST request with the appropriate parameters associated with the targeted membership plan ID. Because the server does not verify if the requesting user possesses administrative rights or any other elevated capability required for such destructive operations, it processes the command as legitimate. This aligns directly with CWE-862, which describes Missing Authorization, where an application fails to enforce proper access controls on a resource or action.
The operational impact of this vulnerability is severe due to the nature of the affected functionality. Membership plans are often central to business logic in websites utilizing subscription models, e-commerce platforms, or premium content portals. The ability for any authenticated user to delete arbitrary membership plans can lead to significant data loss and service disruption. If an attacker deletes a primary payment plan, it may prevent new users from subscribing, thereby causing immediate revenue loss. Furthermore, the deletion of historical or configured plans might break existing integrations with third-party payment gateways like Stripe or PayPal, leading to transaction failures for current subscribers. This scenario also illustrates CWE-250, as the application performs an action that should not be executed by this user role, potentially causing a denial of service condition through data destruction rather than resource exhaustion.
In terms of threat modeling and attack classification, this vulnerability facilitates privilege escalation in effect, even if it does not grant higher system privileges directly. It allows low-privilege users to perform high-impact administrative actions, which is characteristic of CWE-269: Improper Privilege Management. From an ATT&CK perspective, this exploitation vector falls under the Tactic Execution and potentially Impact categories, specifically relating to Data Destruction or Service Availability. An attacker could leverage social engineering techniques to trick a subscriber into clicking a malicious link that triggers the AJAX request via Cross-Site Request Forgery if nonces are also improperly handled, although the primary issue here is the lack of server-side authorization checks regardless of how the request was initiated.
To mitigate this vulnerability, immediate patching to version 3.29.11 or later is required as it addresses these access control deficiencies. For organizations unable to update immediately due to compatibility concerns with other plugins, a temporary workaround involves restricting AJAX endpoint access through server-side configuration rules that limit POST requests from untrusted sources or requiring additional authentication tokens for sensitive administrative actions. Additionally, implementing strict input validation and ensuring all state-changing operations are preceded by capability checks using WordPress functions such as current_user_can is essential to prevent recurrence of similar flaws in custom code. Regular security audits focusing on authorization logic across all AJAX handlers can help identify other potential gaps where low-privileged users might interact with administrative features inadvertently left exposed due to oversight during development.