CVE-2025-10303: WordPress Library Management System Auth Bypass

CVE-2025-10303 Overview

CVE-2025-10303 is a missing authorization vulnerability in the Library Management System plugin for WordPress. The flaw resides in the owt7_library_management_ajax_handler() function, which lacks a capability check. All versions up to and including 3.1 are affected. Authenticated attackers with Subscriber-level access or higher can invoke the handler to update and manipulate several of the plugin's settings and features. The weakness is classified under CWE-862: Missing Authorization.

Critical Impact
Any authenticated WordPress user, including low-privileged Subscribers, can modify plugin settings on sites running Library Management System 3.1 or earlier.

Affected Products

Library Management System plugin for WordPress, versions up to and including 3.1
WordPress sites that allow Subscriber-level or higher user registration with the plugin installed
Any WordPress installation exposing the plugin's AJAX endpoint to authenticated users

Discovery Timeline

2025-10-15 - CVE-2025-10303 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-10303

Vulnerability Analysis

The Library Management System plugin registers an AJAX action handled by owt7_library_management_ajax_handler(). WordPress routes AJAX requests through admin-ajax.php, which authenticates the caller but does not enforce role-based authorization on its own. Each handler must independently verify that the caller holds the required capability.

In vulnerable builds, this handler processes state-changing operations without calling current_user_can() or an equivalent capability check. Any logged-in user, including a self-registered Subscriber, can therefore submit crafted requests that alter plugin settings and features. The plugin source at admin/class-library-management-system-admin.php line 831 shows the affected handler prior to remediation.

Root Cause

The root cause is a missing authorization check on a privileged AJAX endpoint. The handler relied only on WordPress authentication and, in some flows, a nonce, neither of which restricts action to administrators. Because Subscriber is the default role for self-registration, sites that allow user registration expose the endpoint to anonymous internet users after a single account creation.

Attack Vector

Exploitation requires network access to the WordPress admin AJAX endpoint and a valid low-privileged session. An attacker registers or compromises a Subscriber account, obtains a valid AJAX nonce from an accessible page, and issues a POST request to wp-admin/admin-ajax.php invoking the vulnerable action. The response confirms whether the settings mutation succeeded. Impact is limited to integrity of plugin configuration; the CVE record indicates no direct confidentiality or availability impact.

No public proof-of-concept exploit is listed in the CVE references. See the WordPress plugin code review and Wordfence Threat Intelligence Report for technical details.

Detection Methods for CVE-2025-10303

Indicators of Compromise

Unexpected POST requests to wp-admin/admin-ajax.php referencing the Library Management System AJAX action from accounts holding only the Subscriber role.
Unauthorized changes to Library Management System plugin settings recorded in wp_options without a corresponding administrator session.
New or recently registered Subscriber accounts followed by plugin configuration changes on the same site.

Detection Strategies

Inventory WordPress installations and flag any running Library Management System version 3.1 or earlier.
Enable WordPress audit logging to capture calls to owt7_library_management_ajax_handler and correlate them with the acting user's capability level.
Review web server access logs for repeated requests to admin-ajax.php with the plugin's action parameter originating from a single low-privileged session.

Monitoring Recommendations

Alert on plugin option updates occurring outside of administrator-authenticated sessions.
Track newly registered users that access admin-ajax.php within minutes of account creation.
Monitor for anomalous change frequency on plugin settings tables, including wp_options rows owned by the Library Management System plugin.

How to Mitigate CVE-2025-10303

Immediate Actions Required

Update the Library Management System plugin to the version released in WordPress changeset 3382258 or later.
Audit user accounts and remove unrecognized Subscriber-level registrations created before the patch was applied.
Review plugin settings for unauthorized modifications and restore known-good values.

Patch Information

The vendor addressed the issue by adding a capability check to owt7_library_management_ajax_handler(). The fix is committed in WordPress plugin changeset 3382258. Site administrators should upgrade to the fixed release published after this changeset.

Workarounds

Disable open user registration in Settings → General until the plugin is upgraded.
Deactivate the Library Management System plugin on affected sites if a patch cannot be applied immediately.
Restrict access to wp-admin/admin-ajax.php for Subscriber-level accounts using a Web Application Firewall (WAF) rule that blocks the vulnerable action name.

bash

# Example WAF rule (ModSecurity syntax) to block the vulnerable AJAX action
SecRule REQUEST_URI "@endsWith /wp-admin/admin-ajax.php" \
  "chain,phase:2,deny,status:403,id:1010303,\
   msg:'Block CVE-2025-10303 Library Management System AJAX handler'"
  SecRule ARGS:action "@streq owt7_library_management_ajax_handler"