CVE-2026-12936: SQL Injection in Recurio WooCommerce Plugin (v1.1.3)

Technical summary

This is a generic SQL injection vulnerability (CWE-89) affecting Recurio versions up to and including 1.1.3. The vulnerability stems from insufficient escaping of the 'data' parameter combined with lack of prepared statement usage in the underlying SQL query construction. An authenticated user with shop manager-level privileges or above can inject arbitrary SQL commands by supplying crafted input to the affected parameter, allowing query manipulation and unauthorized data extraction. The vulnerability requires authentication and admin-level capability but presents a clear path to confidentiality breach once those prerequisites are met.

Business impact

Compromise of this vulnerability could expose sensitive customer data including personal information, email addresses, purchase history, and potentially payment-related details stored in the WooCommerce database. For e-commerce operations, such a breach carries significant compliance risk under GDPR, PCI-DSS, and similar regulations, along with reputational damage and potential customer notification obligations. The attack surface is limited to authenticated users with shop manager access, but insider threats or compromised admin accounts represent realistic threat scenarios in many organizations.

Affected systems

WordPress installations running the Recurio – Ultimate Subscription for WooCommerce plugin in version 1.1.3 or earlier are affected. Any site using this plugin to manage subscription-based WooCommerce products is potentially vulnerable. Installations where multiple users hold shop manager or administrator roles face higher risk due to expanded potential attacker pool.

Exploitability

Exploitation requires valid WordPress authentication with shop manager-level access or above, which significantly reduces the attack surface compared to unauthenticated vulnerabilities. However, the barrier is not prohibitive; compromised credentials, malicious insiders, or poorly managed access controls could enable exploitation. No public exploit code is known to be available, and no CISA KEV listing exists for this vulnerability. The technical barrier to crafting SQL injection payloads is relatively low for attackers with database knowledge.

Remediation

Upgrade the Recurio – Ultimate Subscription for WooCommerce plugin to a version newer than 1.1.3 that includes proper input sanitization and parameterized queries. Verify the patched version against the plugin developer's advisory. As an interim measure, restrict shop manager role assignment to only trusted personnel and conduct access reviews to identify and remove unnecessary elevated permissions. Consider implementing Web Application Firewall (WAF) rules to detect and block suspicious SQL injection patterns in requests to the affected plugin.

Patch guidance

Check the official Recurio plugin repository or the plugin vendor's website for version updates beyond 1.1.3 that address this SQL injection issue. Update the plugin through WordPress's standard plugin management interface once a patched version is available. Before updating in production, test the new version on a staging environment to ensure compatibility with your WooCommerce setup and any customizations. Document the update date and version for compliance records.

Detection guidance

Monitor database query logs for unusual SQL commands initiated through the 'data' parameter, particularly those containing UNION, SELECT, or other query manipulation indicators. Examine WordPress authentication logs for shop manager account activity, especially during off-hours or from unusual locations. Implement database access monitoring to alert on unexpected data extractions or schema enumeration queries. Search web server logs for HTTP requests to the vulnerable plugin's endpoints with suspicious parameter values containing SQL syntax characters or encoding attempts.

Why prioritize this

While the CVSS 3.1 score of 4.9 (MEDIUM) reflects the authentication requirement, the confidentiality impact and exposure of customer data warrant prompt attention. Organizations processing payments or storing personally identifiable information should prioritize patching, particularly if shop manager accounts are shared or if access controls are not strictly enforced. The vulnerability's presence in a popular e-commerce plugin increases likelihood of targeted reconnaissance by threat actors seeking customer data breaches.

Risk score, explained

The CVSS 3.1 score of 4.9 reflects a HIGH confidentiality impact (C:H) but zero integrity and availability impact (I:N, A:N), combined with the requirement for high-privilege authentication (PR:H). Network-accessible over standard channels (AV:N) with low attack complexity (AC:L), the vulnerability trades severity for privilege requirements. Organizations with strictly controlled admin access may rate this lower; those with looser credential management or multiple shop manager accounts should consider the effective risk higher than the base score suggests.

Frequently asked questions