CVE-2026-22341: Booked Authentication Bypass Vulnerability

CVE-2026-22341 Overview

CVE-2026-22341 is an Authentication Bypass Using an Alternate Path or Channel vulnerability (CWE-288) discovered in the Case-Themes Booked WordPress plugin. This security flaw allows attackers to abuse authentication mechanisms to gain unauthorized access to user accounts through an alternate authentication channel, potentially leading to account takeover scenarios.

Critical Impact
This authentication bypass vulnerability enables attackers to compromise user accounts on WordPress sites using the Booked plugin, potentially allowing unauthorized access to booking data and user information.

Affected Products

Case-Themes Booked WordPress Plugin version 3.0.0 and earlier
WordPress installations with vulnerable Booked plugin versions
Sites utilizing the Booked appointment booking functionality

Discovery Timeline

2026-02-20 - CVE CVE-2026-22341 published to NVD
2026-02-24 - Last updated in NVD database

Technical Details for CVE-2026-22341

Vulnerability Analysis

This vulnerability exists within the authentication handling mechanism of the Booked WordPress plugin. The flaw allows attackers with low-level privileges to bypass normal authentication channels and abuse the authentication process through an alternate path. This represents a classic CWE-288 weakness where the application fails to properly validate authentication attempts across all possible entry points.

The vulnerability requires network access and low privileges to exploit, meaning an authenticated user with minimal permissions could potentially escalate their access or take over other user accounts. The attack complexity is low, requiring no user interaction, making it relatively straightforward to exploit once an attacker has established initial low-privilege access.

Root Cause

The root cause of this vulnerability stems from improper implementation of authentication controls in the Booked plugin. The application provides an alternate authentication path or channel that does not adequately verify user identity before granting access to protected functionality. This allows attackers to circumvent standard authentication procedures and gain unauthorized access to accounts.

Attack Vector

The attack is conducted over the network without requiring user interaction. An attacker with low-privilege access to a WordPress site running the vulnerable Booked plugin can exploit this flaw to bypass authentication controls. The exploitation path involves leveraging an alternate authentication channel that fails to properly validate the requesting user's identity, enabling account takeover scenarios.

The vulnerability affects the confidentiality and integrity of the system, allowing unauthorized read and write access to user data, though availability is not impacted. Attackers could potentially access booking information, modify user settings, or take control of user accounts on affected WordPress installations.

Detection Methods for CVE-2026-22341

Indicators of Compromise

Unusual authentication patterns or login attempts from unexpected user accounts
Suspicious API calls to Booked plugin endpoints from authenticated users with low privileges
Unexpected account modifications or booking changes without legitimate user activity
Authentication logs showing access to protected resources through non-standard paths

Detection Strategies

Monitor WordPress authentication logs for anomalous login patterns
Implement web application firewall (WAF) rules to detect authentication bypass attempts
Review access logs for unusual plugin endpoint requests
Enable detailed logging for the Booked plugin to track authentication events

Monitoring Recommendations

Configure alerts for failed authentication attempts followed by successful access via alternate paths
Monitor user privilege escalation events within the WordPress admin panel
Track changes to user account settings that don't correspond with legitimate activity
Implement behavioral analysis to detect account takeover patterns

How to Mitigate CVE-2026-22341

Immediate Actions Required

Update the Booked WordPress plugin to a version newer than 3.0.0 if a patch is available
Audit user accounts for signs of unauthorized access or modifications
Review plugin permissions and restrict access to authenticated plugin functionality
Consider temporarily disabling the Booked plugin until a patch is applied

Patch Information

Security researchers have identified this vulnerability affecting the Case-Themes Booked plugin through version 3.0.0. Users should monitor the Patchstack WordPress Vulnerability Database for updated patch information and remediation guidance from the vendor.

Workarounds

Implement additional authentication layers such as two-factor authentication for WordPress users
Use a web application firewall to filter suspicious requests to plugin endpoints
Restrict plugin access to trusted administrators only until patched
Monitor and audit all authentication-related activities on affected WordPress installations

bash

# Configuration example
# Add to wp-config.php to enable detailed authentication logging
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);

# Restrict plugin directory access via .htaccess
# Add to /wp-content/plugins/booked/.htaccess
<Files "*.php">
  Order Deny,Allow
  Deny from all
  Allow from 127.0.0.1
</Files>