CVE-2026-54812 Overview
CVE-2026-54812 is a blind SQL injection vulnerability in the StylemixThemes Motors plugin for WordPress. The flaw affects all versions up to and including 1.4.109 of the Motors car dealership and classified listings plugin. Attackers can exploit the issue remotely without authentication by sending crafted requests that inject malicious SQL fragments into database queries. The vulnerability is tracked under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). Successful exploitation enables extraction of sensitive database content and partial impact to availability, with a scope change that extends impact beyond the vulnerable component.
Critical Impact
Unauthenticated remote attackers can execute blind SQL injection against WordPress sites running Motors plugin versions through 1.4.109, exposing confidential data and affecting site availability.
Affected Products
- StylemixThemes Motors plugin (motors-car-dealership-classified-listings)
- All versions from initial release through 1.4.109
- WordPress installations using the affected plugin
Discovery Timeline
- 2026-06-17 - CVE-2026-54812 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-54812
Vulnerability Analysis
The Motors plugin fails to properly neutralize special characters in user-supplied input before incorporating that input into SQL queries. The vulnerability falls under CWE-89 and is classified as blind SQL injection. In blind SQL injection, the application does not return query results directly in HTTP responses. Attackers infer database content by observing differential responses such as boolean conditions, timing delays, or error states. The attack vector is network-based, requires no authentication, and needs no user interaction.
Root Cause
The root cause is improper input sanitization within one or more request handlers in the Motors plugin. User-controlled parameters reach SQL statements without prepared statements or correct escaping through WordPress APIs such as $wpdb->prepare(). This allows attacker-supplied SQL syntax to alter the structure of executed queries. The Patchstack advisory confirms the issue is present in all versions through 1.4.109.
Attack Vector
An unauthenticated attacker sends HTTP requests containing crafted parameters to a vulnerable endpoint exposed by the Motors plugin. The injected payload modifies the SQL query executed by the WordPress database backend. Because the injection is blind, attackers typically use boolean-based or time-based techniques to enumerate database schema, extract user credentials from wp_users, and read post metadata. The scope change indicator means exploitation can affect resources beyond the plugin itself, including the full WordPress database.
No verified public exploit code is currently available. Refer to the Patchstack WordPress Vulnerability advisory for technical details.
Detection Methods for CVE-2026-54812
Indicators of Compromise
- HTTP requests to Motors plugin endpoints containing SQL keywords such as UNION, SELECT, SLEEP(, BENCHMARK(, or boolean payloads like OR 1=1.
- Repeated requests with incrementally varying parameter values, indicating automated blind injection enumeration.
- Database query log entries showing unusually long execution times consistent with time-based blind injection.
- New or modified administrator accounts in wp_users following suspicious request patterns.
Detection Strategies
- Inspect web server access logs for requests targeting Motors plugin URLs with encoded SQL metacharacters such as %27, %22, --, or %23.
- Deploy a web application firewall (WAF) ruleset that flags SQL injection signatures against WordPress plugin paths.
- Enable WordPress database query logging and alert on queries containing concatenated user input or anomalous SLEEP calls.
Monitoring Recommendations
- Monitor outbound database connections for unusual query volume or duration originating from the WordPress PHP worker.
- Alert on creation of new privileged WordPress accounts or modifications to the wp_options table.
- Track plugin file integrity to identify post-exploitation persistence such as injected PHP backdoors.
How to Mitigate CVE-2026-54812
Immediate Actions Required
- Update the StylemixThemes Motors plugin to a version above 1.4.109 once a patched release is available from the vendor.
- Audit wp_users for unauthorized accounts and rotate credentials for all administrators.
- Apply WAF rules that block SQL injection patterns targeting Motors plugin endpoints until patching is complete.
Patch Information
The Patchstack advisory tracks remediation status for this vulnerability. Consult the Patchstack WordPress Vulnerability advisory for the latest fixed version and vendor guidance. At the time of CVE publication, all versions through 1.4.109 are affected.
Workarounds
- Disable the Motors plugin until a vendor patch is installed if the affected functionality is not business-critical.
- Restrict access to Motors plugin endpoints by IP allowlisting at the reverse proxy or WAF layer.
- Enable Patchstack or an equivalent virtual patching service to receive mitigation rules for this CVE.
# Temporary mitigation: deactivate the Motors plugin via WP-CLI
wp plugin deactivate motors-car-dealership-classified-listings
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
