CVE-2026-92425 Overview
CVE-2026-92425 affects the Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress in versions prior to 1.2.4. The plugin fails to enforce object-level authorization on several host-management operations. Users assigned the plugin's custom administrator-defined role can read, modify, and permanently delete other hosts' records. The flaw also allows deletion of the WordPress user accounts linked to those hosts. The weakness is tracked under CWE-639 (Authorization Bypass Through User-Controlled Key).
Critical Impact
Authenticated users with the plugin's custom role can tamper with or destroy other hosts' bookings and remove linked WordPress user accounts, causing loss of scheduling data and account availability.
Affected Products
- Hydra Booking — Appointment Scheduling & Booking Calendar WordPress plugin versions before 1.2.4
- WordPress sites where the plugin's custom host role has been assigned to non-trusted users
- WordPress user accounts linked to host records managed by the plugin
Discovery Timeline
- 2026-09-19 - CVE-2026-92425 published to NVD
- 2026-09-21 - Last updated in NVD database
Technical Details for CVE-2026-92425
Vulnerability Analysis
The Hydra Booking plugin exposes host-management endpoints that operate on host records identified by user-supplied identifiers. The plugin verifies that a caller holds its custom administrator-assigned role, but it does not verify that the target host record belongs to the calling user. This is a textbook Insecure Direct Object Reference (IDOR) pattern classified under CWE-639.
Any user granted the plugin's custom role can substitute another host's identifier in read, update, or delete requests. The plugin honors the request and performs the operation against the referenced record. Delete operations propagate to the linked WordPress user account, removing that user from the site entirely.
The issue requires authentication and a privileged plugin role, which limits opportunistic exploitation. However, deployments that use the plugin's role for third-party schedulers or franchise operators expose all hosts to any single host account.
Root Cause
The root cause is missing object-level authorization on host-management operations. The plugin conflates role membership with per-object ownership. Functions that fetch, modify, or delete host records accept an identifier from the request and act on it without checking whether the authenticated user owns or is otherwise permitted to act on that specific record.
Attack Vector
An authenticated attacker holding the plugin's custom host role sends crafted requests to the plugin's host-management endpoints. The attacker enumerates or guesses host record identifiers and issues read, update, or delete calls referencing those identifiers. The plugin executes the operation, disclosing or destroying data belonging to other hosts and removing their bound WordPress accounts. See the WPScan Vulnerability Report for endpoint details.
Detection Methods for CVE-2026-92425
Indicators of Compromise
- Unexpected deletion of WordPress user accounts previously linked to host records
- Host records showing modifications from accounts that do not own them
- Booking data disappearing without corresponding administrator activity
- WordPress audit logs showing plugin AJAX or REST calls to host endpoints originating from low-privileged host accounts
Detection Strategies
- Review web server access logs for repeated requests to Hydra Booking host-management endpoints containing sequential or varied numeric identifiers
- Correlate wp_users and wp_usermeta deletion events with plugin activity in the same session
- Alert on plugin API calls where the acting user identifier does not match the host record owner identifier
Monitoring Recommendations
- Enable a WordPress audit logging plugin that records user deletion, role changes, and plugin AJAX or REST activity
- Forward WordPress and web server logs to a centralized SIEM for correlation across authentication and object-modification events
- Baseline expected host activity and alert on deviations such as one host account touching multiple host record identifiers
How to Mitigate CVE-2026-92425
Immediate Actions Required
- Upgrade the Hydra Booking plugin to version 1.2.4 or later on every WordPress site where it is installed
- Audit accounts assigned the plugin's custom host role and revoke access from users who do not require it
- Review host records and linked WordPress user accounts for unauthorized modification or deletion since the plugin was installed
Patch Information
The vendor addressed the flaw in Hydra Booking version 1.2.4 by adding object-level authorization checks to host-management operations. Administrators should update through the WordPress plugin dashboard or by replacing the plugin directory with the patched release. Refer to the WPScan Vulnerability Report for the fixed-version reference.
Workarounds
- Restrict the plugin's custom host role to fully trusted internal staff until the update is deployed
- Temporarily deactivate the Hydra Booking plugin on sites where the custom role is assigned to external users
- Place the WordPress admin and plugin AJAX or REST endpoints behind a web application firewall rule that limits access by source IP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
