CVE-2026-1219: Sonaar Music Player IDOR Vulnerability

CVE-2026-1219 Overview

The MP3 Audio Player – Music Player, Podcast Player & Radio by Sonaar plugin for WordPress contains an Insecure Direct Object Reference (IDOR) vulnerability in versions 4.0 through 5.10. The vulnerability exists within the load_track_note_ajax function, which fails to properly validate user-controlled input parameters. This security flaw allows unauthenticated attackers to access and view the contents of private posts without authorization.

Critical Impact

Unauthenticated attackers can exploit this vulnerability to access private post content, potentially exposing sensitive information, draft posts, or confidential media content stored on affected WordPress sites.

Affected Products

• MP3 Audio Player – Music Player, Podcast Player & Radio by Sonaar versions 4.0 to 5.10
• WordPress installations using the affected plugin versions

Discovery Timeline

• 2026-02-19 - CVE-2026-1219 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2026-1219

Vulnerability Analysis

This vulnerability is classified as CWE-639: Authorization Bypass Through User-Controlled Key, commonly known as Insecure Direct Object Reference (IDOR). The load_track_note_ajax AJAX handler in the Sonaar Music plugin accepts a post ID parameter from user input without verifying whether the requesting user has permission to access that specific post.

When WordPress stores private posts, they should only be accessible to authenticated users with appropriate privileges. However, the vulnerable function directly uses the user-supplied post ID to retrieve content without checking the post's visibility status or the user's authorization level. This allows any unauthenticated visitor to craft requests that expose private post content simply by iterating through or guessing post IDs.

The attack is particularly concerning because it requires no authentication and can be executed remotely over the network. While the vulnerability only impacts confidentiality (allowing unauthorized read access), it does not permit modification or deletion of content.

Root Cause

The root cause is a missing authorization check in the load_track_note_ajax function. The code at line 323 in class-sonaar-music-public.php processes the incoming post ID parameter without validating that the current user has permission to view the requested post. Proper implementation would require checking the post's status (private, draft, published) and comparing against the current user's capabilities before returning any content.

Attack Vector

The vulnerability is exploited through a network-based attack vector where an unauthenticated attacker sends crafted AJAX requests to the WordPress installation. The attacker can enumerate post IDs and retrieve private content by manipulating the post ID parameter in requests to the load_track_note_ajax endpoint.

The attack flow involves:

1. Identifying a WordPress site using the vulnerable Sonaar Music plugin
2. Sending AJAX requests to the load_track_note_ajax endpoint with various post ID values
3. Receiving private post content in the response without any authentication requirement

For technical implementation details, refer to the WordPress Plugin Code Review and the Wordfence Vulnerability Analysis.

Detection Methods for CVE-2026-1219

Indicators of Compromise

• Unusual volume of AJAX requests targeting load_track_note_ajax from single IP addresses
• Sequential or systematic post ID enumeration patterns in request logs
• Access attempts to private post IDs from unauthenticated sessions
• Unexpected access patterns to the Sonaar Music plugin endpoints

Detection Strategies

• Monitor WordPress AJAX request logs for load_track_note_ajax calls with varying post ID parameters
• Implement rate limiting on AJAX endpoints to detect automated enumeration attempts
• Configure Web Application Firewall (WAF) rules to detect IDOR attack patterns
• Review access logs for requests originating from unauthenticated users targeting sensitive endpoints

Monitoring Recommendations

• Enable detailed logging for WordPress AJAX handlers to capture request parameters
• Set up alerts for high-frequency requests to plugin-specific AJAX endpoints
• Monitor for access to private or draft post content from unexpected sources
• Implement SentinelOne Singularity Platform for real-time endpoint monitoring and threat detection

How to Mitigate CVE-2026-1219

Immediate Actions Required

• Update the MP3 Audio Player – Music Player, Podcast Player & Radio by Sonaar plugin to version 5.11 or later immediately
• Audit access logs to determine if the vulnerability has been exploited on your installation
• Review private post content for any potential data exposure
• Consider temporarily disabling the plugin if immediate update is not possible

Patch Information

The vulnerability has been addressed in the plugin update. The security fix is documented in WordPress Changeset #3453076, which adds proper authorization checks to the load_track_note_ajax function. Site administrators should update to the latest version of the plugin through the WordPress admin dashboard or by downloading directly from the WordPress plugin repository.

Workarounds

• Temporarily disable the MP3 Audio Player by Sonaar plugin until the update can be applied
• Implement WAF rules to block unauthorized AJAX requests to the load_track_note_ajax endpoint
• Restrict AJAX endpoint access to authenticated users only via server configuration
• Consider moving sensitive content to alternative storage while the vulnerable plugin version is in use

# Disable the vulnerable plugin via WP-CLI until patched
wp plugin deactivate mp3-music-player-by-sonaar

# Update to the patched version
wp plugin update mp3-music-player-by-sonaar

# Verify the updated version
wp plugin list --name=mp3-music-player-by-sonaar --fields=name,version,status