CVE-2026-1249: Sonaar Music Player SSRF Vulnerability

CVE-2026-1249 Overview

The MP3 Audio Player – Music Player, Podcast Player & Radio by Sonaar plugin for WordPress is vulnerable to Server-Side Request Forgery (SSRF) in versions 5.3 to 5.10. The vulnerability exists in the load_lyrics_ajax_callback function, which allows authenticated attackers with author-level access or above to make web requests to arbitrary locations originating from the web application. This can be exploited to query and modify information from internal services, potentially exposing sensitive data or enabling further attacks on internal infrastructure.

Critical Impact

Authenticated attackers can leverage SSRF to probe internal network services, access cloud metadata endpoints, and potentially exfiltrate sensitive configuration data from systems not intended to be publicly accessible.

Affected Products

• MP3 Audio Player – Music Player, Podcast Player & Radio by Sonaar versions 5.3 to 5.10
• WordPress installations running the vulnerable plugin versions
• Internal services accessible from the WordPress server

Discovery Timeline

• 2026-02-14 - CVE-2026-1249 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2026-1249

Vulnerability Analysis

This Server-Side Request Forgery (SSRF) vulnerability (CWE-918) allows authenticated users with author-level privileges to abuse the lyrics loading functionality to make arbitrary HTTP requests from the WordPress server. The load_lyrics_ajax_callback function fails to properly validate and restrict URLs supplied by users, enabling attackers to target internal network resources that would otherwise be inaccessible from external networks.

The attack requires authentication at the author level, which is commonly granted to content contributors on WordPress sites. Once authenticated, an attacker can craft malicious requests through the vulnerable AJAX endpoint to reach internal services, cloud provider metadata endpoints (such as AWS IMDSv1 at 169.254.169.254), or other backend systems.

Root Cause

The root cause of this vulnerability is insufficient URL validation in the load_lyrics_ajax_callback function. The function accepts user-supplied URLs without implementing proper allow-listing, protocol restrictions, or internal network address filtering. This allows the WordPress server to be weaponized as a proxy for reaching otherwise inaccessible internal resources.

Attack Vector

The attack is executed over the network and requires low privilege access (author-level authentication). An attacker would:

1. Authenticate to the WordPress site with at least author-level credentials
2. Identify the vulnerable AJAX endpoint associated with the lyrics loading functionality
3. Craft requests with malicious URLs targeting internal services or cloud metadata endpoints
4. Analyze responses to extract sensitive information or map internal network topology

The vulnerability allows attackers to bypass network segmentation controls since requests originate from the trusted WordPress server rather than external sources.

Detection Methods for CVE-2026-1249

Indicators of Compromise

• Unusual outbound HTTP requests from the WordPress server to internal IP ranges (e.g., 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16)
• Requests to cloud metadata endpoints such as 169.254.169.254 originating from WordPress
• Abnormal activity patterns from author-level user accounts making repeated AJAX requests
• Log entries showing the load_lyrics_ajax_callback endpoint being accessed with unusual URL parameters

Detection Strategies

• Monitor web server access logs for requests to the lyrics loading AJAX endpoint with suspicious URL parameters
• Implement network monitoring to detect outbound connections from the WordPress server to internal services or metadata endpoints
• Review WordPress audit logs for unusual activity from author-level accounts
• Deploy web application firewall rules to detect SSRF patterns in request parameters

Monitoring Recommendations

• Enable verbose logging for WordPress AJAX requests to capture URL parameters
• Configure network egress monitoring to alert on connections to RFC 1918 private address ranges
• Implement anomaly detection for user accounts making high volumes of requests to the affected endpoint
• Review cloud provider security logs for metadata service access attempts

How to Mitigate CVE-2026-1249

Immediate Actions Required

• Update the MP3 Audio Player – Music Player, Podcast Player & Radio by Sonaar plugin to a version newer than 5.10
• Review WordPress user accounts and ensure only trusted users have author-level access or above
• Implement network-level controls to restrict outbound connections from the WordPress server
• Consider temporarily disabling the plugin if an immediate update is not possible

Patch Information

The vulnerability has been addressed in versions after 5.10. The patch details can be reviewed in the WordPress Plugin Change Log. Additional vulnerability information is available through Wordfence Vulnerability Intelligence.

Workarounds

• Restrict author-level access to only trusted users until the plugin can be updated
• Implement web application firewall rules to block or monitor requests containing internal IP addresses or cloud metadata URLs in the lyrics endpoint parameters
• Configure server-level egress filtering to prevent the WordPress server from connecting to internal network ranges
• Consider using a plugin security scanner to monitor for suspicious activity

# Example: Block access to internal IPs via .htaccess (temporary mitigation)
# Add to WordPress .htaccess to restrict AJAX endpoint access
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_URI} load_lyrics_ajax_callback
RewriteCond %{QUERY_STRING} (127\.|10\.|192\.168\.|172\.1[6-9]\.|172\.2[0-9]\.|172\.3[0-1]\.|169\.254\.)
RewriteRule ^ - [F,L]
</IfModule>