CVE-2026-109592 in OpenStation Plugin
Summary
by MITRE • 10/30/2026
The OpenStation: Desktop Windows, Dock & Virtual Desktops for WP Admin plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.1.16. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to modify arbitrary other users' placement rows (position, sort order, parent folder, and meta) and read serialized metadata — including title, permalink, and post status — of the entities those orphaned placements reference. Exploitation requires at least one orphaned placement to exist — a state produced naturally by the plugin's own trash cascade, which marks a parent folder as trashed while leaving child placements' parent_id intact — and the attacker must first self-enable OpenStation via the save-openstation AJAX endpoint, which requires only the 'read' capability held by every default WordPress role. This was also independently found by the OpenStation team.
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Analysis
by VulDB Data Team • 10/30/2026
The vulnerability identified in the OpenStation plugin for WordPress represents a critical authorization bypass flaw affecting all versions up to and including 1.1.16. As a desktop-like interface extension for the WordPress admin dashboard, this plugin manages virtual desktops, docks, and window placements through complex database structures that track user-specific configurations. The core technical failure lies in the insufficient verification of user privileges when processing requests related to placement modifications. Specifically, the application logic fails to validate whether the authenticated actor possesses administrative rights or ownership over the specific data entities being manipulated. This oversight allows any authenticated user with subscriber-level access and above to execute actions that should be restricted to higher-privileged roles, fundamentally breaking the principle of least privilege expected in multi-user WordPress environments.
The operational impact of this flaw is significant due to its ability to facilitate both unauthorized state modification and sensitive data disclosure. Attackers can modify arbitrary other users' placement rows, which includes altering position coordinates, sort orders, parent folder assignments, and associated metadata. This capability allows an attacker to disrupt the user experience for others or potentially engineer social engineering attacks by manipulating visual cues within the admin interface. More critically, the vulnerability enables the reading of serialized metadata from entities referenced by orphaned placements. These metadata fields contain sensitive information such as post titles, permalinks, and current post statuses. By exploiting this data leakage, an attacker can gain insights into unpublished content or draft articles that are not visible through standard WordPress interfaces, thereby compromising the confidentiality of ongoing editorial work.
Exploitation of this vulnerability relies on specific environmental conditions created by the plugin's own internal logic regarding trash cascades. The flaw requires the existence of at least one orphaned placement, a state where a parent folder is marked as trashed but child placements retain their original parent_id references rather than being cleaned up or nullified. This inconsistency creates a reachable code path that bypasses standard authorization checks. Furthermore, the attacker must first self-enable OpenStation functionality via the save-openstation AJAX endpoint. Notably, this initial step requires only the 'read' capability, which is granted to every default WordPress role including subscribers and contributors. This low barrier to entry means that even users with minimal privileges can trigger the conditions necessary for exploitation without needing elevated permissions or complex setup procedures.
From a classification perspective, this vulnerability aligns with CWE-284 Improper Access Control, as it involves failing to restrict access to resources based on user roles. Additionally, the ability of low-privileged users to modify system configurations and read sensitive metadata maps closely to ATT&CK techniques related to Privilege Escalation and Collection via API endpoints. The fact that this issue was independently discovered by both external researchers and the OpenStation development team highlights a gap in automated security testing for complex plugin architectures that manage stateful UI components within the WordPress ecosystem.
To mitigate this risk, immediate action is required to update the OpenStation plugin to version 1.1.17 or later where these authorization checks have been reinforced. Administrators should ensure that all plugins are kept up to date with security patches provided by their developers. In environments where updating is not immediately feasible, restricting user roles to only those who strictly require access to the admin dashboard can reduce the attack surface. Additionally, implementing Web Application Firewall rules that monitor for anomalous AJAX requests targeting placement modification endpoints may provide a temporary layer of defense against exploitation attempts while patching efforts are underway. Regular audits of database integrity regarding orphaned records should also be conducted to prevent the creation of exploitable states through natural plugin usage patterns.