CVE-2026-39432: Timetics Auth Bypass Vulnerability

CVE-2026-39432 Overview

CVE-2026-39432 is a missing authorization vulnerability in the Arraytics Timetics plugin for WordPress. The flaw affects all versions up to and including 1.0.53 and stems from incorrectly configured access control security levels [CWE-862]. Unauthenticated attackers can reach plugin functionality intended to require privileged access. The vulnerability is exploitable over the network without user interaction.

Critical Impact

An unauthenticated remote attacker can bypass access control checks in the Timetics plugin and interact with restricted functionality, leading to disclosure of sensitive data and limited integrity impact on WordPress sites running affected versions.

Affected Products

• Arraytics Timetics WordPress plugin versions through 1.0.53
• WordPress sites with the Timetics appointment booking plugin installed
• All deployments of Timetics prior to the patched release

Discovery Timeline

• 2026-05-12 - CVE-2026-39432 published to NVD
• 2026-05-12 - Last updated in NVD database

Technical Details for CVE-2026-39432

Vulnerability Analysis

The vulnerability is a broken access control flaw classified under [CWE-862] Missing Authorization. The Timetics plugin exposes functionality without verifying that the requesting user holds the required capabilities or role. Attackers reach protected endpoints by issuing direct HTTP requests to the plugin's REST routes or AJAX handlers.

The attack vector is network-based and requires no authentication or user interaction. Successful exploitation yields high confidentiality impact and low integrity impact, while availability is not affected. Sites running Timetics through version 1.0.53 are exposed until the vendor's patched release is installed.

Root Cause

The root cause is the absence or misconfiguration of capability checks within plugin request handlers. WordPress plugins typically enforce authorization through current_user_can() or permission_callback parameters on REST routes. Timetics handlers in affected versions either omit these checks or apply checks that permit unauthenticated callers.

Attack Vector

An attacker sends crafted HTTP requests directly to plugin endpoints exposed by Timetics. Because authorization is not enforced server-side, the requests are processed as if originating from a privileged user. The attacker can read booking data, customer records, or other plugin-managed objects depending on the affected endpoint. Refer to the Patchstack Timetics Plugin Vulnerability advisory for endpoint-level details.

Detection Methods for CVE-2026-39432

Indicators of Compromise

• Unauthenticated HTTP requests to /wp-json/timetics/* REST routes originating from external IPs
• Unexpected admin-ajax.php requests referencing Timetics actions without a valid logged-in session cookie
• Bulk read access to booking, appointment, or customer records outside normal usage patterns
• New or modified plugin-managed records lacking corresponding administrator authentication events

Detection Strategies

• Inspect web server access logs for requests to Timetics REST namespaces issued without authentication cookies or nonces
• Correlate WordPress audit logs against web requests to identify privileged actions with no matching user session
• Deploy web application firewall rules that flag unauthenticated access to plugin endpoints expected to require capabilities

Monitoring Recommendations

• Enable verbose logging on the WordPress REST API and forward logs to a centralized analytics platform
• Alert on spikes in 4xx and 2xx responses against Timetics endpoints from single source IPs
• Track installed plugin versions across the WordPress estate and flag any host still running Timetics 1.0.53 or earlier

How to Mitigate CVE-2026-39432

Immediate Actions Required

• Update the Timetics plugin to a version later than 1.0.53 as soon as the vendor patch is available
• Audit booking, appointment, and customer data for unauthorized access or modification since the plugin was installed
• Restrict access to /wp-json/timetics/* routes at the web server or WAF layer until patching is complete

Patch Information

Review the Patchstack Timetics Plugin Vulnerability advisory for the fixed version and vendor remediation guidance. Apply the update through the WordPress plugin manager or by replacing plugin files with the patched release.

Workarounds

• Deactivate the Timetics plugin if business operations permit until a patched version is installed
• Block unauthenticated requests to Timetics REST and AJAX endpoints using a web application firewall
• Limit access to /wp-admin/ and /wp-json/ to known IP ranges where feasible

# Example nginx rule to block unauthenticated access to Timetics REST routes
location ~* ^/wp-json/timetics/ {
    if ($http_cookie !~* "wordpress_logged_in") {
        return 403;
    }
}