CVE-2026-13613 Overview
CVE-2026-13613 is an authenticated SQL injection vulnerability in the KiviCare WordPress plugin versions before 4.5.2. The plugin fails to properly sanitize and escape user-supplied parameters before including them in SQL queries. Authenticated users holding a clinic staff-level role can inject arbitrary SQL, resulting in unauthorized read, modify, or delete access to backend database contents. The flaw is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). KiviCare is a clinic and patient management plugin used by medical practices running WordPress, making patient records and clinical data direct targets.
Critical Impact
Authenticated clinic staff can extract, modify, or destroy patient and clinic data stored in the WordPress database via crafted SQL payloads.
Affected Products
- KiviCare WordPress plugin versions prior to 4.5.2
- WordPress sites using KiviCare with clinic staff-level accounts provisioned
- Medical clinic deployments relying on KiviCare for patient record management
Discovery Timeline
- 2026-08-12 - CVE-2026-13613 published to the National Vulnerability Database (NVD)
- 2026-08-12 - Last updated in NVD database
Technical Details for CVE-2026-13613
Vulnerability Analysis
The KiviCare plugin exposes plugin endpoints that accept user-controlled parameters and concatenate them into SQL statements without parameterized queries or proper escaping. Because the WordPress database abstraction layer (wpdb) provides prepare() for safe query construction, the vulnerable code path bypasses that function or misuses it. An authenticated user with the clinic staff role can submit crafted input through the affected request parameter to alter query logic.
Successful exploitation allows extraction of arbitrary tables in the WordPress database, including wp_users, patient appointment tables, and any custom KiviCare tables holding personally identifiable health information. Attackers can also perform stacked queries or UNION-based extraction depending on the query context. The requirement for authentication limits mass exploitation but does not prevent abuse by malicious insiders, compromised staff accounts, or attackers who acquire staff credentials through phishing or credential stuffing.
Root Cause
The root cause is missing input sanitization and lack of prepared statement usage in one or more KiviCare handlers that build SQL queries from HTTP request parameters. The vulnerable code trusts input from authenticated staff users without validating type, length, or content against the expected data schema.
Attack Vector
Exploitation requires network access to the WordPress site and valid clinic staff credentials. The attacker submits an HTTP request to a vulnerable KiviCare endpoint containing a crafted parameter carrying SQL syntax. No user interaction is required beyond the attacker's own authenticated session. Refer to the WPScan Vulnerability Report for endpoint-specific details.
No public proof-of-concept code has been released at time of writing, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2026-13613
Indicators of Compromise
- HTTP requests to KiviCare plugin endpoints containing SQL keywords such as UNION, SELECT, SLEEP(, INFORMATION_SCHEMA, or comment sequences (--, /*) in parameter values
- Unusual database query patterns in MySQL slow query or general query logs referencing WordPress tables outside typical KiviCare workflows
- Elevated response times on plugin AJAX endpoints indicative of time-based blind injection probes
- Access to wp_users or wp_usermeta originating from KiviCare-related PHP call stacks
Detection Strategies
- Enable and review WordPress database query logging for KiviCare handler functions during audit windows
- Deploy a web application firewall rule set that flags SQL metacharacters in requests to /wp-admin/admin-ajax.php actions registered by KiviCare
- Correlate clinic staff account activity with anomalous query volume or unexpected data export patterns
Monitoring Recommendations
- Alert on any clinic staff account triggering WAF SQL injection signatures against the WordPress site
- Monitor for new administrator accounts or role escalations following suspicious staff account activity
- Track outbound data volume from the WordPress host to detect bulk record extraction
How to Mitigate CVE-2026-13613
Immediate Actions Required
- Update the KiviCare plugin to version 4.5.2 or later on all WordPress installations
- Audit existing clinic staff accounts and remove any that are unused or unrecognized
- Rotate credentials for all clinic staff accounts and enforce strong password policies with multi-factor authentication
- Review WordPress and MySQL logs for signs of prior exploitation dating back to plugin installation
Patch Information
The vendor addressed CVE-2026-13613 in KiviCare version 4.5.2. Administrators should upgrade through the WordPress plugin dashboard or by replacing plugin files via SFTP. Confirm the installed version in wp-admin under Plugins after upgrade. See the WPScan Vulnerability Report for advisory details.
Workarounds
- Temporarily disable the KiviCare plugin if patching cannot be performed immediately
- Restrict access to /wp-admin/ using IP allowlists at the reverse proxy or firewall
- Deploy WAF rules targeting SQL injection patterns on all KiviCare AJAX endpoints until the patch is applied
# Example: verify installed KiviCare version using WP-CLI
wp plugin get kivicare-clinic-management-system --field=version
# Update KiviCare to the patched release
wp plugin update kivicare-clinic-management-system --version=4.5.2
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
