CVE-2026-62135: Booktics Auth Bypass Vulnerability

CVE-2026-62135 Overview

CVE-2026-62135 is a broken access control vulnerability in the Booktics WordPress plugin versions 1.0.24 and earlier. The flaw allows unauthenticated attackers to invoke functionality that should require authorization checks. The issue is classified as Missing Authorization [CWE-862] and is exploitable over the network without user interaction.

The vulnerability affects the plugin's request handling, where actions execute without verifying the caller's permissions. Successful exploitation results in limited integrity impact on affected WordPress sites running the plugin.

Critical Impact
Unauthenticated attackers can trigger protected plugin actions on any WordPress site running Booktics 1.0.24 or earlier, modifying data without valid credentials.

Affected Products

Booktics WordPress plugin versions <= 1.0.24
WordPress installations with the Booktics plugin active
Sites exposing plugin endpoints to the public internet

Discovery Timeline

2026-09-11 - CVE-2026-62135 published to NVD
2026-09-11 - Last updated in NVD database

Technical Details for CVE-2026-62135

Vulnerability Analysis

The vulnerability stems from missing authorization checks on plugin request handlers in the Booktics plugin. Endpoints that perform state-changing operations do not verify whether the requester has the necessary capabilities or a valid nonce.

An attacker sends crafted HTTP requests directly to the plugin's exposed actions. Because the plugin bypasses WordPress capability checks such as current_user_can() and does not enforce nonce validation with check_admin_referer() or wp_verify_nonce(), the actions execute in the context of an anonymous user.

The impact is limited to integrity, meaning attackers can modify data handled by the plugin but cannot directly read confidential information or cause service unavailability through this flaw. The EPSS score is 0.176%, indicating a low modeled probability of exploitation at this time.

Root Cause

The root cause is Missing Authorization [CWE-862]. Plugin code paths that should be restricted to authenticated administrators or booking managers execute without capability enforcement. WordPress AJAX and REST endpoints registered by the plugin fail to gate access behind permission callbacks.

Attack Vector

Exploitation occurs remotely over the network with low attack complexity and no authentication. An attacker discovers the plugin on a target site and issues HTTP POST or GET requests to the vulnerable action endpoints. No user interaction is required.

For technical specifics, see the Patchstack Vulnerability Report.

Detection Methods for CVE-2026-62135

Indicators of Compromise

Unauthenticated POST requests to wp-admin/admin-ajax.php referencing Booktics actions
REST API calls to Booktics namespaced routes from unauthenticated sources
Unexpected modifications to booking data, appointments, or plugin settings in the database
Absence of a valid _wpnonce parameter on state-changing plugin requests

Detection Strategies

Review web server access logs for requests to plugin endpoints without a preceding authenticated session
Correlate HTTP 200 responses on plugin action URLs with the absence of WordPress authentication cookies
Compare current plugin data against known-good baselines to identify unauthorized modifications

Monitoring Recommendations

Enable WordPress audit logging to capture plugin action invocations and data modifications
Forward web server and WordPress logs to a centralized SIEM for correlation and alerting
Alert on high request volumes to admin-ajax.php from single source IPs targeting Booktics actions

How to Mitigate CVE-2026-62135

Immediate Actions Required

Update the Booktics plugin to a version newer than 1.0.24 as soon as a fixed release is available
Deactivate and remove the plugin if a patched version is not yet published and the functionality is not essential
Restrict access to wp-admin/admin-ajax.php and REST endpoints using a web application firewall
Audit recent booking and plugin configuration data for unauthorized changes

Patch Information

Refer to the Patchstack Vulnerability Report for the current patch status and vendor advisory. Apply the vendor-supplied update through the WordPress plugin management console once released.

Workarounds

Deploy WAF rules that block unauthenticated requests to Booktics-specific action names
Use a WordPress security plugin to enforce nonce validation and capability checks on AJAX endpoints
Limit access to WordPress administrative and AJAX endpoints by source IP where feasible

bash

# Example WAF rule concept to block unauthenticated Booktics AJAX actions
# Adapt to your WAF syntax (ModSecurity, Cloudflare, AWS WAF, etc.)
SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" \
  "chain,deny,status:403,id:1006213,msg:'Block unauthenticated Booktics action'"
  SecRule ARGS:action "@rx ^booktics_" \
    "chain"
    SecRule &REQUEST_COOKIES:/wordpress_logged_in_/ "@eq 0"