CVE-2026-11973 Overview
CVE-2026-11973 is a SQL injection vulnerability [CWE-89] in the WP-Lister Lite for eBay plugin for WordPress. The flaw affects all versions up to and including 3.8.8. It stems from insufficient escaping of the orderby parameter and lack of proper query preparation. Authenticated attackers with administrator-level access can append additional SQL statements to existing queries. Successful exploitation allows extraction of sensitive information from the WordPress database.
Critical Impact
Authenticated administrators can inject arbitrary SQL through the orderby parameter to exfiltrate database contents, including user credentials and session data.
Affected Products
- WP-Lister Lite for eBay plugin for WordPress
- All versions up to and including 3.8.8
- WordPress installations using the affected plugin
Discovery Timeline
- 2026-07-29 - CVE-2026-11973 published to NVD
- 2026-07-30 - Last updated in NVD database
Technical Details for CVE-2026-11973
Vulnerability Analysis
The vulnerability resides in multiple database interaction points within the WP-Lister Lite for eBay plugin. Affected files include EbayOrdersModel.php, ProfilesModel.php, and StocksLogTable.php. Each location constructs SQL queries that incorporate the orderby parameter directly into the query string. The plugin fails to escape user-supplied input or use prepared statements with parameter binding.
Authenticated attackers with administrator privileges can supply crafted orderby values through plugin request handlers. The injected SQL executes with the database privileges of the WordPress site. This enables UNION-based extraction of arbitrary tables, including wp_users and wp_usermeta.
Root Cause
The root cause is improper neutralization of special elements used in an SQL command [CWE-89]. The plugin concatenates the orderby request parameter into query strings without invoking wpdb::prepare() or applying sanitization functions such as sanitize_sql_orderby(). This design assumes the parameter is trusted, but WordPress request context does not enforce that assumption.
Attack Vector
Exploitation requires authenticated access at administrator level or higher. An attacker sends an HTTP request to a plugin endpoint that consumes the orderby parameter, appending SQL syntax such as a UNION SELECT clause. Because the payload merges into the executed query, the database returns injected results to the attacker or exposes them through error messages. The attack vector is network-based and requires no user interaction beyond the authenticated session.
The vulnerability manifests across the query builder logic in EbayOrdersModel.php at lines 1291 and 1354, ProfilesModel.php at lines 278 and 304, and StocksLogTable.php at lines 277 and 316. See the WordPress plugin source and the Wordfence advisory for technical details.
Detection Methods for CVE-2026-11973
Indicators of Compromise
- Unusual HTTP requests to WP-Lister admin endpoints containing SQL keywords such as UNION, SELECT, SLEEP, or INFORMATION_SCHEMA in the orderby parameter
- Web server logs showing long or URL-encoded orderby values from authenticated admin sessions
- Database error entries referencing malformed ORDER BY clauses in WordPress query logs
- Unexpected outbound queries against wp_users, wp_options, or wp_usermeta tables originating from plugin execution
Detection Strategies
- Deploy Web Application Firewall (WAF) rules that inspect the orderby parameter on WordPress admin routes for SQL metacharacters
- Enable MySQL general query logging on staging systems and hunt for ORDER BY clauses containing subqueries or UNION operators
- Correlate WordPress administrator login events with anomalous plugin request volumes
Monitoring Recommendations
- Monitor administrator account activity for unusual query patterns against WordPress database tables
- Alert on any database error rate increases coinciding with WP-Lister plugin usage
- Track outbound data volumes from web servers hosting WordPress instances that run WP-Lister Lite
How to Mitigate CVE-2026-11973
Immediate Actions Required
- Update the WP-Lister Lite for eBay plugin to a version above 3.8.8 once a patched release is available from the vendor
- Audit WordPress administrator accounts and rotate credentials for any account showing suspicious activity
- Restrict administrator role assignment and enforce multi-factor authentication on all privileged WordPress accounts
- Review database query logs and WordPress audit trails for evidence of prior exploitation
Patch Information
At time of publication, the vulnerability affects all versions up to and including 3.8.8. Refer to the Wordfence advisory for the latest patch status and the WordPress plugin repository for source updates.
Workarounds
- Deactivate the WP-Lister Lite for eBay plugin until a patched version is released and applied
- Deploy WAF signatures that block SQL syntax within the orderby parameter on WordPress admin routes
- Limit administrator access to a small set of trusted accounts and enforce IP allowlisting on /wp-admin endpoints
- Configure database user privileges to follow least privilege, restricting the WordPress database user to only the tables it requires
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
