CVE-2026-56067 Overview
CVE-2026-56067 is an unauthenticated SQL injection vulnerability in the JetSmartFilters WordPress plugin, affecting versions up to and including 3.8.3. The flaw is classified under CWE-89 — improper neutralization of special elements used in an SQL command. Attackers can exploit this issue remotely over the network without authentication or user interaction.
JetSmartFilters is a widely deployed filtering plugin used with Elementor-based WordPress sites, expanding the attack surface across e-commerce and content-driven deployments. Successful exploitation allows adversaries to inject arbitrary SQL into backend database queries.
Critical Impact
Unauthenticated remote attackers can inject SQL statements into the WordPress database, exposing site data and disrupting availability.
Affected Products
- Crocoblock JetSmartFilters WordPress plugin versions <= 3.8.3
- WordPress installations running JetSmartFilters with public-facing filter endpoints
- Elementor-based WordPress sites integrating JetSmartFilters functionality
Discovery Timeline
- 2026-06-26 - CVE-2026-56067 published to NVD
- 2026-06-26 - Last updated in NVD database
Technical Details for CVE-2026-56067
Vulnerability Analysis
The vulnerability originates from improper neutralization of user-supplied input passed into SQL queries within the JetSmartFilters plugin. Filter parameters accepted through public-facing WordPress endpoints are concatenated into database queries without adequate sanitization or parameterization. This enables attackers to alter the intent of the underlying SQL statement.
Because the affected endpoint does not require authentication, any remote user can submit crafted requests. The scope is marked as changed, meaning the vulnerability can impact resources beyond the vulnerable component itself. Confidentiality is severely affected, and attackers may induce limited availability impact on the database or web application.
Exploitation requires no privileges and no user interaction. Attack complexity is low, making the vulnerability practical to weaponize at scale against exposed WordPress installations. According to the Patchstack WordPress Vulnerability Report, the flaw is present through version 3.8.3.
Root Cause
The root cause is failure to properly sanitize or parameterize input parameters used in dynamic SQL construction. The plugin relies on string concatenation rather than prepared statements or the WordPress $wpdb->prepare() API for building queries against filter-related tables.
Attack Vector
An unauthenticated attacker sends HTTP requests containing malicious SQL payloads through the plugin's filter parameters. The server processes these values and forwards them into database queries. The attacker can then extract records, enumerate schema, or manipulate query logic. The vulnerability manifests when filter query parameters reach the database layer without sanitization. See the Patchstack advisory for additional technical context.
Detection Methods for CVE-2026-56067
Indicators of Compromise
- HTTP requests to JetSmartFilters endpoints containing SQL syntax such as UNION SELECT, SLEEP(, BENCHMARK(, or comment sequences like -- and /*
- Unusual spikes in POST or GET requests targeting filter query parameters from single source IP addresses
- WordPress database error entries in web server or PHP logs originating from filter-related queries
- Newly created administrator accounts or unexpected wp_users and wp_options table modifications following inbound filter requests
Detection Strategies
- Deploy web application firewall (WAF) rules that identify SQL injection patterns in requests to /wp-admin/admin-ajax.php and JetSmartFilters routes
- Enable MySQL general query logging temporarily to identify malformed queries containing tautologies or stacked statements
- Monitor WordPress plugin version inventory to flag any host still running JetSmartFilters <= 3.8.3
- Correlate outbound traffic from web servers with database access patterns to identify data exfiltration attempts
Monitoring Recommendations
- Ingest WordPress, web server, and database logs into a centralized SIEM for cross-source correlation
- Alert on repeated HTTP 500 responses from JetSmartFilters endpoints, which often indicate injection probing
- Track authentication events and privilege changes on WordPress administrative accounts in near real time
How to Mitigate CVE-2026-56067
Immediate Actions Required
- Update JetSmartFilters to a version later than 3.8.3 as soon as a patched release is available from Crocoblock
- Audit WordPress sites for the presence and version of the JetSmartFilters plugin and remove it if not required
- Review database logs and administrative account activity for signs of prior exploitation
- Rotate WordPress database credentials, administrator passwords, and API keys if compromise is suspected
Patch Information
Refer to the Patchstack WordPress Vulnerability Report for the latest vendor patch status and fixed version information. Apply the vendor-supplied update through the WordPress plugin manager or via WP-CLI.
Workarounds
- Deploy virtual patching through a WAF such as Patchstack, Wordfence, or Cloudflare with SQL injection rulesets enabled
- Restrict access to JetSmartFilters endpoints via IP allow-listing where feasible
- Temporarily deactivate the JetSmartFilters plugin on sites that cannot be patched immediately
# Update JetSmartFilters via WP-CLI once a fixed version is released
wp plugin update jet-smart-filters --path=/var/www/html
# Or deactivate the plugin as a temporary mitigation
wp plugin deactivate jet-smart-filters --path=/var/www/html
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
