CVE-2026-4661
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk25th percentile - higher than 25% of all known CVEs
Summary
The WP CTA – Sticky CTA Builder plugin for WordPress up to version 2.2.2 is vulnerable to time-based blind SQL Injection via the 'fildname' parameter in the ajaxCheck() method. Due to missing authorization and the endpoint being accessible to unauthenticated users, attackers can inject arbitrary SQL queries and extract sensitive data, including administrator password hashes.
Risk Assessment
The organization is at risk of sensitive data leakage from the database, especially administrator password hashes, which could lead to full site compromise and further attacks.
Recommendation
Immediately update the WP CTA – Sticky CTA Builder plugin to the latest available version that fixes this vulnerability. If no update is available, temporarily disable the plugin.
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Original NVD description (English source)
The WP CTA – Sticky CTA Builder, Generate Leads, Promote Sales plugin for WordPress is vulnerable to time-based blind SQL Injection via the 'fildname' parameter in all versions up to, and including, 2.2.2. This is due to insufficient escaping of user-supplied column names in the ajaxCheck() method and lack of preparation in the $wpdb->update() call. The vulnerability is compounded by the complete absence of authorization checks and the endpoint being registered for unauthenticated users via wp_ajax_nopriv_. This makes it possible for unauthenticated attackers to inject arbitrary SQL queries and extract sensitive information from the database via time-based blind SQL injection techniques, including administrator password hashes.