CVE-2026-24570: Edwiser Bridge Auth Bypass Vulnerability

CVE-2026-24570 Overview

CVE-2026-24570 is a missing authorization vulnerability in the WisdmLabs Edwiser Bridge plugin for WordPress. The flaw stems from incorrectly configured access control security levels [CWE-862]. Attackers with low-level authenticated access can exploit functionality that should be restricted to higher-privileged roles. The issue affects Edwiser Bridge versions up to and including 4.3.2. Exploitation requires network access and low privileges but no user interaction. Successful exploitation impacts both integrity and availability of affected WordPress installations integrated with Moodle through the plugin.

Critical Impact
Authenticated attackers can bypass access controls in Edwiser Bridge to perform actions reserved for higher-privileged roles, compromising integrity and availability of the WordPress-Moodle integration.

Affected Products

WisdmLabs Edwiser Bridge plugin for WordPress versions up to and including 4.3.2
WordPress sites using Edwiser Bridge for Moodle integration
Earlier unsupported versions of the edwiser-bridge plugin

Discovery Timeline

2026-01-23 - CVE-2026-24570 published to NVD
2026-04-28 - Last updated in NVD database

Technical Details for CVE-2026-24570

Vulnerability Analysis

The vulnerability resides in the Edwiser Bridge plugin, which connects WordPress sites to Moodle learning management systems. One or more plugin endpoints fail to perform proper authorization checks before executing sensitive actions. An authenticated user with low privileges can invoke functionality that the plugin design intends to restrict to administrators or other elevated roles.

The issue is classified under [CWE-862] Missing Authorization. The plugin authenticates the requesting user but does not verify that user holds the required capability or role to perform the requested operation. The result is a broken access control condition that exposes administrative or instructor-level functions to subscriber-level accounts.

The attack vector is network-based and exploitation complexity is low. No user interaction is required beyond the attacker's own authenticated session. The impact extends to integrity and availability of the plugin's data and operations, while confidentiality remains unaffected.

Root Cause

The root cause is the absence of capability checks such as current_user_can() on plugin action handlers. WordPress plugins must validate user capabilities before processing privileged AJAX, REST, or admin-post requests. Edwiser Bridge through version 4.3.2 omits these checks on at least one privileged code path.

Attack Vector

An attacker with a low-privileged WordPress account, such as a subscriber or student role, sends a crafted HTTP request to a vulnerable plugin endpoint. Because the endpoint lacks authorization enforcement, the request succeeds and modifies plugin state or triggers privileged functionality. Refer to the Patchstack Vulnerability Report for technical details on the affected endpoints.

Detection Methods for CVE-2026-24570

Indicators of Compromise

Unexpected requests to Edwiser Bridge plugin endpoints originating from low-privileged user sessions
Plugin configuration or course-mapping changes that do not correspond to administrator activity
Anomalous POST requests to admin-ajax.php with Edwiser Bridge action parameters from subscriber accounts

Detection Strategies

Review WordPress audit logs for actions performed by users whose roles should not permit those actions
Correlate plugin-related HTTP requests with the authenticated user's role at the time of the request
Inspect web server access logs for repeated requests to edwiser-bridge endpoints from non-admin sessions

Monitoring Recommendations

Enable a WordPress activity logging plugin to record user role context for every privileged action
Forward web server and WordPress logs to a centralized SIEM for anomaly analysis
Alert on any change to Edwiser Bridge settings, course synchronization data, or user-course mappings

How to Mitigate CVE-2026-24570

Immediate Actions Required

Update Edwiser Bridge to a version later than 4.3.2 once the vendor releases a patched build
Audit existing user accounts and remove unnecessary low-privileged accounts that could be abused
Restrict registration on WordPress sites running Edwiser Bridge until patched

Patch Information

At the time of publication, the vulnerability affects Edwiser Bridge through version 4.3.2. Administrators should monitor the Patchstack Vulnerability Report and the WisdmLabs vendor channels for an official fix and apply it as soon as it is available.

Workarounds

Disable the Edwiser Bridge plugin until a patched version is released if the integration is not business-critical
Place the WordPress administrative interface and plugin endpoints behind a web application firewall with rules blocking unauthorized access to plugin actions
Restrict access to wp-admin/admin-ajax.php for low-privileged roles using server-level access controls where feasible

bash

# Configuration example: disable the plugin via WP-CLI until a patch is available
wp plugin deactivate edwiser-bridge