CVE-2026-39596 in Blocksy Companion Pro Plugin
Summary
by MITRE • 06/17/2026
Unauthenticated SQL Injection in Blocksy Companion Pro < 2.1.29 versions.
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Analysis
by VulDB Data Team • 06/17/2026
This vulnerability represents a critical security flaw in the Blocksy Companion Pro plugin for WordPress, affecting versions prior to 2.1.29. The issue stems from insufficient input validation and sanitization within the plugin's handling of user-supplied data, creating an avenue for malicious actors to execute arbitrary SQL commands against the underlying database. The vulnerability specifically manifests when the plugin processes certain parameters without proper authentication checks, allowing unauthenticated attackers to inject malicious SQL payloads directly into database queries. This type of vulnerability falls under the CWE-89 classification for SQL Injection, which is categorized as a high-risk vulnerability in the OWASP Top Ten 2021. The attack vector typically involves manipulating URL parameters or form inputs that are subsequently processed by the plugin's database interaction functions, where user input is directly concatenated into SQL queries without proper escaping or parameterization.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with the capability to manipulate, delete, or extract sensitive information from the WordPress database. Successful exploitation could result in complete database compromise, user credential theft, and potential lateral movement within the affected system. Attackers could leverage this vulnerability to escalate privileges, inject backdoors, or modify core WordPress functionality through the compromised plugin. The lack of authentication requirements makes this particularly dangerous as it allows any remote user to attempt exploitation without requiring valid credentials. According to ATT&CK framework, this vulnerability maps to T1190 - Exploit Public-Facing Application and T1071.004 - Application Layer Protocol: DNS, as attackers might use the compromised system to establish command and control channels. The vulnerability also aligns with T1046 - Network Service Scanning and T1566 - Phishing, as attackers often discover such vulnerabilities through automated scanning tools before launching more sophisticated attacks.
Mitigation strategies for this vulnerability require immediate plugin updates to version 2.1.29 or later, which contain the necessary patches to address the SQL injection flaw. System administrators should implement comprehensive monitoring of database queries and network traffic to detect anomalous patterns that might indicate exploitation attempts. Additionally, implementing proper input validation, parameterized queries, and regular security audits of WordPress plugins can prevent similar vulnerabilities from emerging. Organizations should also consider implementing web application firewalls and database activity monitoring solutions to provide additional layers of protection. The vulnerability highlights the importance of keeping all WordPress plugins updated and following security best practices such as the principle of least privilege and regular security assessments. Network segmentation and access control measures can further reduce the potential impact of such vulnerabilities by limiting the attack surface and preventing unauthorized access to sensitive systems.