CVE-2026-86449 in LearnPress Plugin
Summary
by MITRE • 09/16/2026
The LearnPress WordPress plugin before 4.4.7 does not check the user's capabilities before applying a user supplied post status filter in one of its REST routes, allowing unauthenticated attackers to list courses that are not published, including draft, pending, private, scheduled and trashed ones.
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Analysis
by VulDB Data Team • 09/16/2026
The vulnerability identified in LearnPress versions prior to 4.4.7 represents a critical failure in access control mechanisms within the WordPress plugin ecosystem. This flaw specifically affects REST API endpoints exposed by the plugin, which are designed to facilitate communication between the client-side interface and the server backend. The core issue lies in the improper implementation of capability checks before processing user-supplied input for post status filters. In secure software architecture, any operation that retrieves or manipulates data based on external parameters must first verify that the requesting entity possesses the necessary permissions to perform such actions. LearnPress failed to enforce this fundamental principle, allowing unauthenticated users to bypass standard authentication requirements and interact with administrative-level functionality through public-facing API routes.
From a technical perspective, the vulnerability stems from the absence of validation logic within specific REST route handlers responsible for querying course data. When an attacker submits a request containing a post status parameter set to values such as draft, pending, private, scheduled, or trashed, the application processes this input without verifying if the requester is logged in or holds appropriate roles like administrator or editor. This lack of server-side authorization checks means that sensitive internal states of content are exposed directly through HTTP responses. The REST API acts as a bridge for dynamic content loading on modern web applications, and when its security boundaries are porous, it becomes an effective vector for information disclosure attacks.
The operational impact of this vulnerability is significant due to the nature of the data being exposed. Course platforms often contain proprietary educational material, unpublished curriculum structures, pricing strategies, and internal organizational workflows that are not intended for public consumption. By listing courses with statuses like draft or pending, attackers can gain insight into a site's content strategy before it goes live. Furthermore, access to private or trashed items may reveal sensitive information about user interactions, feedback mechanisms, or previously deleted materials that might contain personal data or confidential business logic. This level of visibility aids adversaries in reconnaissance efforts, potentially leading to more targeted attacks such as social engineering against instructors or administrators who are aware of the unpublished content's existence and value.
This vulnerability aligns with CWE-284 Improper Access Control, specifically reflecting a failure to enforce proper authorization checks before granting access to resources. It also maps closely to MITRE ATT&CK technique T1078 Valid Accounts if authentication were bypassed via other means, but in this unauthenticated context, it is best categorized under reconnaissance activities where attackers gather information about the target environment without detection. The ability to enumerate unpublished content allows for a deeper understanding of the application's structure and potential attack surface, facilitating further exploitation attempts against related components or users associated with those courses.
Mitigation strategies must prioritize immediate patching to version 4.4.7 or later where this capability check has been properly implemented by the developers. For organizations unable to update immediately due to compatibility constraints, implementing a Web Application Firewall (WAF) rule can provide temporary protection by blocking requests that attempt to access REST endpoints with suspicious post status parameters indicative of enumeration attacks. Additionally, security teams should audit other custom plugins for similar patterns where user input influences database queries without adequate role verification. Regular penetration testing focusing on API endpoint authorization logic is recommended to identify and remediate such flaws before they can be exploited in the wild.