CVE-2026-82304: Music Store WordPress Plugin SQLi Vulnerability

CVE-2026-82304 Overview

CVE-2026-82304 is a SQL injection vulnerability in The Music Store WordPress plugin versions before 1.4.5. The plugin fails to sanitize and escape user input before incorporating it into SQL statements. Unauthenticated attackers can exploit this flaw remotely over the network without user interaction. The vulnerability is classified under [CWE-89] Improper Neutralization of Special Elements used in an SQL Command.

Critical Impact
Unauthenticated remote attackers can inject arbitrary SQL statements into the WordPress database, potentially exposing sensitive data stored in the site's database and impacting resources beyond the plugin's own scope.

Affected Products

The Music Store WordPress plugin versions prior to 1.4.5
WordPress sites with The Music Store plugin installed and activated
Any e-commerce site relying on the plugin for music sales functionality

Discovery Timeline

2026-09-05 - CVE-2026-82304 published to the National Vulnerability Database (NVD)
2026-09-08 - Last updated in NVD database

Technical Details for CVE-2026-82304

Vulnerability Analysis

The Music Store plugin accepts user-supplied input and passes it directly into SQL queries without applying sanitization or parameterization. This allows an attacker to break out of the intended SQL context and append or modify query logic. Because the flaw is reachable without authentication, any remote user who can send HTTP requests to the affected WordPress instance can attempt exploitation.

The vulnerability carries a changed scope, meaning a successful attack can affect resources outside the vulnerable component itself. In practice, this translates to database-level access that extends beyond the plugin's own tables and can reach WordPress core tables containing user credentials, session tokens, and site configuration.

Root Cause

The root cause is missing input validation and the absence of prepared statements. The plugin concatenates untrusted request parameters into SQL query strings rather than using WordPress $wpdb->prepare() with placeholders. This is a textbook [CWE-89] pattern where developer-supplied query construction bypasses the safe parameter-binding APIs provided by the WordPress database abstraction layer.

Attack Vector

An unauthenticated attacker sends a crafted HTTP request containing SQL metacharacters in a vulnerable parameter. The plugin embeds the payload directly into a query, causing the database to execute attacker-controlled SQL. Typical payloads use UNION SELECT clauses to exfiltrate data from arbitrary tables, or time-based blind techniques such as SLEEP() when responses do not echo query results. Refer to the WPScan Vulnerability Report for advisory details.

Detection Methods for CVE-2026-82304

Indicators of Compromise

HTTP requests to plugin endpoints containing SQL metacharacters such as ', UNION, SELECT, --, or /*
Unusual outbound database queries against wp_users or wp_options originating from plugin-handled requests
Web server access logs showing repeated requests with SLEEP(), BENCHMARK(), or INFORMATION_SCHEMA references
New or modified administrator accounts appearing in wp_users without a corresponding admin action

Detection Strategies

Deploy a Web Application Firewall (WAF) with SQL injection signatures tuned for WordPress plugin traffic
Enable MySQL general query logging temporarily to identify anomalous queries traceable to plugin PHP handlers
Review WordPress debug logs for database errors indicating malformed SQL from plugin endpoints
Baseline normal request patterns to plugin URLs and alert on deviations in parameter content or length

Monitoring Recommendations

Monitor HTTP request bodies and query strings for encoded SQL payloads targeting plugin routes
Alert on unauthenticated requests generating database errors in application logs
Track file integrity of PHP files under wp-content/plugins/music-store/ to detect tampering following exploitation
Correlate web access logs with database audit logs to identify injection attempts that reached the query layer

How to Mitigate CVE-2026-82304

Immediate Actions Required

Update The Music Store plugin to version 1.4.5 or later immediately
If a patch cannot be applied, deactivate and remove the plugin until an update is possible
Audit wp_users and wp_usermeta tables for unauthorized accounts or privilege changes
Rotate all WordPress administrator passwords and invalidate active sessions

Patch Information

The vendor addressed the issue in The Music Store plugin version 1.4.5. Site administrators should apply the update through the WordPress plugin manager or download the fixed release. Refer to the WPScan Vulnerability Report for advisory information.

Workarounds

Restrict access to plugin endpoints using WAF rules that block SQL injection payload patterns
Apply virtual patching at the reverse proxy or WAF layer to filter requests containing SQL metacharacters targeting plugin URLs
Enforce least-privilege on the WordPress database user to limit the impact of successful injection
Enable two-factor authentication on all administrator accounts to reduce follow-on impact if credentials leak

bash

# Example WAF rule (ModSecurity) to block SQLi patterns on plugin endpoints
SecRule REQUEST_URI "@contains /wp-content/plugins/music-store/" \
  "chain,phase:2,deny,status:403,id:1082304,msg:'Block potential SQLi on Music Store plugin'"
SecRule ARGS "@rx (?i)(union[\s\S]+select|sleep\s*\(|benchmark\s*\(|information_schema)" "t:none"