CVE-2026-81762: Booking and Rental Manager Auth Bypass Flaw

CVE-2026-81762 is an authentication bypass vulnerability in Booking and Rental Manager plugin affecting versions up to 2.7.6. This broken access control flaw allows unauthorized users to bypass security. This article covers technical details, affected versions, security impact, and mitigation strategies.

CVE-2026-81762 Overview

CVE-2026-81762 is a broken access control vulnerability in the Booking and Rental Manager for WooCommerce WordPress plugin. The flaw affects all plugin versions up to and including 2.7.6. Authenticated users with subscriber-level privileges can perform actions that should be restricted to higher-privileged roles. The weakness is classified under CWE-862: Missing Authorization.

Critical Impact
A subscriber-level account can bypass access controls to modify booking and rental data managed by the plugin, resulting in an integrity impact on affected WordPress sites.

Affected Products

Booking and Rental Manager for WooCommerce plugin versions <= 2.7.6
WordPress sites running the vulnerable plugin with open subscriber registration
WooCommerce deployments relying on this plugin for booking or rental workflows

Discovery Timeline

2026-08-31 - CVE-2026-81762 published to NVD
2026-09-01 - Last updated in NVD database

Technical Details for CVE-2026-81762

Vulnerability Analysis

The plugin exposes functionality without verifying that the caller holds the required capability. Any authenticated user, including the low-privilege subscriber role, can invoke restricted actions. The vulnerability requires network access and authentication, but no user interaction. Successful exploitation impacts data integrity while confidentiality and availability remain unaffected.

The Exploit Prediction Scoring System places CVE-2026-81762 in the lower percentile of near-term exploitation likelihood. No public proof-of-concept or in-the-wild exploitation has been reported at the time of publication.

Root Cause

The root cause is missing authorization checks on plugin request handlers. The affected endpoints do not call WordPress capability functions such as current_user_can() or validate nonces tied to a privileged role before executing state-changing operations. As a result, the code treats any authenticated session as sufficient permission.

Attack Vector

An attacker first registers or obtains a subscriber account on a target WordPress site. The attacker then issues authenticated HTTP requests to plugin endpoints that lack authorization enforcement. These requests modify booking or rental records controlled by the plugin. See the Patchstack Vulnerability Report for advisory details.

Detection Methods for CVE-2026-81762

Indicators of Compromise

Unexpected changes to booking, rental, or reservation records not tied to administrator activity
WordPress access logs showing subscriber accounts issuing POST requests to plugin AJAX or admin endpoints
New or modified plugin data records created shortly after low-privilege user logins

Detection Strategies

Audit WordPress user roles and identify subscriber accounts that have interacted with plugin endpoints
Correlate plugin database table modifications against the user role of the requester
Alert on HTTP requests to admin-ajax.php or plugin routes containing booking or rental actions from non-administrator sessions

Monitoring Recommendations

Enable WordPress audit logging for user role activity and plugin option changes
Forward web server and WordPress logs to a centralized data lake for role-based query analysis
Monitor for spikes in new subscriber registrations followed by state-changing plugin requests

How to Mitigate CVE-2026-81762

Immediate Actions Required

Update the Booking and Rental Manager for WooCommerce plugin to a version above 2.7.6 once available from the vendor
Disable open user registration or restrict the default new-user role to a lower privilege scope
Review existing subscriber accounts and remove any that are not required for site operations

Patch Information

Refer to the Patchstack advisory for the fixed version and vendor release notes. Apply the update through the WordPress plugin manager or via WP-CLI on managed hosts.

Workarounds

Deactivate the Booking and Rental Manager plugin until a patched version is installed
Deploy a web application firewall rule to block subscriber sessions from calling plugin state-changing endpoints
Enforce strong registration controls, including CAPTCHA and email verification, to slow account creation abuse

bash

# Configuration example: disable open registration and audit subscribers
wp option update users_can_register 0
wp user list --role=subscriber --fields=ID,user_login,user_registered
wp plugin update booking-and-rental-manager-for-woocommerce