CVE-2025-15521: Academy LMS Privilege Escalation Flaw

CVE-2025-15521 Overview

The Academy LMS – WordPress LMS Plugin for Complete eLearning Solution plugin for WordPress contains a critical privilege escalation vulnerability via account takeover in all versions up to, and including, 3.5.0. This vulnerability stems from the plugin's failure to properly validate a user's identity prior to updating their password, instead relying solely on a publicly-exposed nonce for authorization. This security flaw enables unauthenticated attackers to change arbitrary users' passwords, including administrator accounts, and gain full access to their accounts.

Critical Impact

Unauthenticated attackers can compromise any WordPress user account, including administrators, by changing their password without proper identity verification. This could lead to complete site takeover.

Affected Products

• Academy LMS – WordPress LMS Plugin versions up to and including 3.5.0
• WordPress installations using the vulnerable plugin versions
• eLearning platforms built on the affected Academy LMS plugin

Discovery Timeline

• 2026-01-21 - CVE CVE-2025-15521 published to NVD
• 2026-01-26 - Last updated in NVD database

Technical Details for CVE-2025-15521

Vulnerability Analysis

This vulnerability is classified as CWE-639 (Authorization Bypass Through User-Controlled Key), a type of Insecure Direct Object Reference (IDOR) vulnerability. The Academy LMS plugin implements a password reset mechanism that fails to properly authenticate the user requesting the password change. The core issue lies in the authorization logic where the plugin trusts a publicly-exposed WordPress nonce value as the sole means of verifying that a password change request is legitimate.

WordPress nonces are designed to provide protection against Cross-Site Request Forgery (CSRF) attacks, but they are not intended to serve as authentication tokens. The plugin incorrectly assumes that possessing a valid nonce proves the requester is authorized to change a specific user's password.

Root Cause

The vulnerability exists in the password update functionality located in includes/functions.php at line 1581 of version 3.5.0. The function processes password change requests without verifying that the requesting party is either the account owner or has administrative privileges. The nonce used for authorization is accessible to any visitor, making it trivial for attackers to bypass the intended security controls.

The fundamental design flaw is the conflation of CSRF protection with user authentication. While the nonce validates that the request originated from a legitimate form submission, it does not validate the identity of the person making the request.

Attack Vector

The attack can be executed remotely over the network without any authentication requirements. An attacker can exploit this vulnerability by:

1. Obtaining the publicly-exposed nonce value from the WordPress site
2. Crafting a malicious password reset request targeting any user account
3. Submitting the request with the nonce to change the victim's password
4. Using the new password to log in as the compromised user

Since the attack requires no prior authentication and can target administrator accounts, successful exploitation grants attackers complete control over the WordPress installation.

The vulnerability details can be found in the WordPress Plugin Source Code and the Wordfence Vulnerability Report.

Detection Methods for CVE-2025-15521

Indicators of Compromise

• Unexpected password change notifications for user accounts, especially administrators
• Unusual login activity from unknown IP addresses following password changes
• Multiple password reset requests for different user accounts from the same source
• Authentication logs showing successful logins from geographic locations inconsistent with normal user patterns

Detection Strategies

• Monitor WordPress authentication logs for anomalous password change events
• Implement alerting on admin account password modifications
• Review web server access logs for suspicious requests to Academy LMS password-related endpoints
• Deploy Web Application Firewall (WAF) rules to detect and block unauthorized password change attempts

Monitoring Recommendations

• Enable detailed logging for all authentication-related events in WordPress
• Set up real-time alerts for administrator account modifications
• Configure monitoring for bulk password reset attempts targeting multiple accounts
• Implement user behavior analytics to detect account takeover patterns

How to Mitigate CVE-2025-15521

Immediate Actions Required

• Update the Academy LMS plugin to a version newer than 3.5.0 immediately
• Audit all user accounts, especially administrators, for unauthorized access
• Force password resets for all administrator accounts as a precaution
• Review user activity logs for signs of compromise during the exposure window

Patch Information

Organizations using the Academy LMS plugin should update to the latest available version that addresses this vulnerability. The fix should implement proper user identity verification before allowing password changes, ensuring that password update requests are authenticated beyond simple nonce validation.

For detailed technical information about this vulnerability, refer to the Wordfence Threat Intelligence Report.

Workarounds

• Temporarily disable the Academy LMS plugin until an update can be applied
• Implement additional authentication layers such as two-factor authentication (2FA) for all user accounts
• Restrict access to the WordPress admin panel via IP whitelisting
• Deploy a Web Application Firewall with rules to block suspicious password change requests

# Configuration example - Restrict wp-admin access by IP in .htaccess
<Files wp-login.php>
    Order Deny,Allow
    Deny from all
    Allow from YOUR_TRUSTED_IP
</Files>