Critical Avada Builder Flaws Expose 1 Million WordPress Sites

Key Takeaways

• Critical vulnerabilities have been identified in the Avada Builder WordPress plugin.
• Over one million WordPress websites are affected by these flaws, which could lead to data theft and server file access.
• The vulnerabilities include an arbitrary file read (CVE-2026-4782) and a SQL injection (CVE-2026-4798).
• Patches are available in Avada Builder version 3.15.3, released on May 12, 2026.

Two significant security vulnerabilities in the widely adopted Avada Builder WordPress plugin have exposed over a million websites to potential data breaches and unauthorized server file access. Cybersecurity researchers are urging immediate action, warning that unpatched sites are at risk of active exploitation.

The flaws, discovered by security researcher Rafie Muhammad through the Wordfence Bug Bounty Program, include an arbitrary file read vulnerability, tracked as CVE-2026-4782, and a SQL injection vulnerability, identified as CVE-2026-4798. These issues impact Avada Builder versions up to 3.15.2 and 3.15.1, respectively.

Avada Builder Flaws Detailed

Arbitrary File Read Vulnerability (CVE-2026-4782)

The first vulnerability, CVE-2026-4782, permits authenticated users, even those with minimal privileges such as subscribers, to read sensitive files directly from the server. The flaw stems from inadequate validation within the plugin’s handling of the “custom_svg” parameter in a shortcode.

Attackers can manipulate the function responsible for loading files, enabling them to retrieve content from arbitrary file paths. This includes critical system files like wp-config.php, which often contains crucial database credentials and security keys. Essentially, a low-privilege user could bypass security measures to access confidential server data without requiring administrative access.

This vulnerability has been assigned a CVSS score of 6.5, categorizing it as medium severity, yet it carries a high practical risk due to the nature of the exposed data.

SQL Injection Enables Data Theft (CVE-2026-4798)

The second vulnerability, CVE-2026-4798, is considered more severe, with a CVSS score of 7.5. This flaw allows unauthenticated attackers to execute time-based SQL injection attacks via the “product_order” parameter. The plugin’s failure to properly sanitize database queries enables threat actors to inject malicious SQL commands.

Successful exploitation could lead to the extraction of sensitive data, including user credentials and password hashes, from the site’s database. While the attack requires a specific prerequisite—WooCommerce must have been previously installed, even if subsequently disabled—its potential impact remains high. Attackers can employ timing-based techniques, such as SQL SLEEP functions, to exfiltrate information stealthily without generating direct output.

The Avada development team addressed these vulnerabilities in two phases. Version 3.15.2 provided a partial fix, with the comprehensive solution delivered in version 3.15.3, released on May 12, 2026. WordPress site owners utilizing Avada Builder are strongly advised to update their plugin to version 3.15.3 or a later release without delay.

This incident underscores the critical importance of regular security audits for even widely trusted plugins. With over a million active installations, the extensive attack surface makes such vulnerabilities prime targets for malicious actors. As automated exploitation of known flaws becomes more prevalent, timely patching remains the most effective defense mechanism for WordPress site administrators.

What You Should Do

• Immediately update the Avada Builder plugin to version 3.15.3 or the latest available version.
• Review user roles on your WordPress site and remove any unnecessary subscriber or low-privilege accounts.
• Monitor server and database logs for any unusual queries or unexpected file access attempts.
• Consider implementing a robust web application firewall (WAF), such as Wordfence, to provide an additional layer of protection against exploitation attempts.

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