CVE-2026-14326: Timetics WordPress Plugin Auth Bypass Flaw

CVE-2026-14326 Overview

CVE-2026-14326 affects the Timetics WordPress plugin through version 1.0.61. The plugin fails to enforce per-object ownership when updating appointments through its REST API. Users assigned the custom staff role can modify, disable, or take over appointments belonging to other staff members. The flaw maps to [CWE-639] (Authorization Bypass Through User-Controlled Key), a form of Insecure Direct Object Reference (IDOR).

Exploitation requires an authenticated account with the staff role. The vulnerability affects appointment integrity and availability across tenants within a shared Timetics deployment.

Critical Impact
Authenticated staff users can hijack or disable appointments owned by other staff, disrupting scheduling workflows and enabling business logic abuse.

Affected Products

Timetics WordPress plugin versions up to and including 1.0.61
WordPress sites exposing the Timetics REST API endpoints
Multi-staff Timetics deployments relying on role-based separation

Discovery Timeline

2026-09-02 - CVE-2026-14326 published to NVD
2026-09-02 - Last updated in NVD database

Technical Details for CVE-2026-14326

Vulnerability Analysis

The Timetics plugin exposes REST API routes for managing appointments. These routes verify that the caller holds the custom staff role but do not verify that the target appointment belongs to the calling staff member. Any authenticated staff user can supply an arbitrary appointment identifier and issue an update request. The plugin processes the request without checking ownership, permitting cross-staff modification.

The impact is limited to integrity and availability of appointment records. Confidentiality is not directly affected because the vulnerability concerns update operations rather than data disclosure. Attack requires network access to the WordPress site and valid staff credentials.

Root Cause

The root cause is missing per-object authorization on REST API update handlers. The plugin performs role-based access control at the endpoint level but omits the ownership check that binds the acting user to the requested appointment object. This is a textbook Insecure Direct Object Reference pattern under [CWE-639].

Attack Vector

An authenticated staff user sends a crafted HTTP request to the vulnerable Timetics REST API endpoint. The request references an appointment ID owned by another staff member. The plugin accepts the request and applies the update, allowing the attacker to reassign, disable, or overwrite that appointment. See the WPScan Vulnerability Report for technical details.

Detection Methods for CVE-2026-14326

Indicators of Compromise

Unexpected modifications to appointment records where the acting user_id differs from the appointment's assigned staff member.
REST API POST or PUT requests to Timetics appointment endpoints referencing appointment IDs outside the caller's assigned scope.
Sudden reassignment, cancellation, or status changes on appointments without corresponding administrator activity.

Detection Strategies

Enable WordPress REST API request logging and correlate the authenticated user against the target appointment's owner field.
Audit database change history on the Timetics appointments table for updates performed by non-owning staff accounts.
Alert on high-volume appointment update requests originating from a single staff session.

Monitoring Recommendations

Forward WordPress and web server access logs to a centralized SIEM for cross-user access pattern analysis.
Track anomalous staff account behavior including unusual working hours, high update rates, and access to unassigned appointment IDs.
Review Timetics plugin version inventory across managed WordPress sites and flag installations at or below 1.0.61.

How to Mitigate CVE-2026-14326

Immediate Actions Required

Update the Timetics plugin to a version later than 1.0.61 once a patched release is available from the vendor.
Audit all staff-role user accounts and remove or disable accounts that are no longer required.
Review recent appointment modifications for unauthorized changes and restore records from backup where needed.

Patch Information

At the time of publication, the vendor advisory referenced by the WPScan Vulnerability Report lists all versions through 1.0.61 as affected. Administrators should monitor the plugin's changelog for a fixed release and apply it as soon as it is published.

Workarounds

Restrict the custom staff role to trusted personnel only until a patched version is installed.
Place the WordPress REST API behind a web application firewall rule that inspects Timetics appointment update requests and blocks cross-owner ID references.
Temporarily disable the Timetics plugin on sites where staff-role separation is a critical control and no patch is yet available.

bash

# Example WP-CLI commands to inventory and disable the plugin
wp plugin list --name=timetics --fields=name,status,version
wp plugin deactivate timetics