Two security flaws in the Avada Builder WordPress plugin have exposed approximately one million websites to potential attacks. The vulnerabilities allow unauthorized file access and database manipulation through SQL injection.

Wordfence published their security analysis on May 12, detailing the threats discovered by independent researcher Rafie Muhammad. He reported the issues through the Wordfence Bug Bounty Program on March 21. Both vulnerabilities pose significant risks to WordPress installations running the popular page builder plugin.

Critical File Access Vulnerability

The first security flaw, designated CVE-2026-4782, carries a CVSS severity rating of 6.5. This arbitrary file read vulnerability exists within the plugin’s fusion_get_svg_from_file function. The function processes requests through the fusion_section_separator shortcode when users supply a custom_svg parameter.

The vulnerability stems from insufficient validation controls. The function fails to verify file types or validate source locations before processing requests. Consequently, authenticated users with basic subscriber-level privileges can exploit this weakness to access sensitive server files.

Attackers can potentially read the wp-config.php file, which contains critical WordPress database credentials. Additionally, this file stores cryptographic keys and security salts essential for site protection. Unauthorized access to these credentials could enable complete site takeover.

Unauthenticated SQL Injection Risk

The second vulnerability, tracked as CVE-2026-4798, presents a more severe threat with a CVSS rating of 7.5. This time-based SQL injection flaw affects the product_order parameter in specific configurations. Unlike the first vulnerability, this exploit requires no authentication.

The security gap exists despite the plugin’s use of sanitize_text_field() on user input. However, this sanitization function does not provide adequate protection against SQL injection attacks. The ORDER BY clause concatenates directly into database queries without proper escaping through WordPress’s prepare() function.

This vulnerability only affects sites with a specific configuration pattern. The exploit works on WordPress installations where WooCommerce was previously active but has since been deactivated. This narrow attack surface may limit the total number of vulnerable sites.

Vendor Response and Patch Deployment

Wordfence provided full vulnerability disclosure to the Avada development team on March 24 and 25. The vendor responded promptly, beginning remediation work the same day they received notification. This rapid response demonstrates effective coordination between security researchers and plugin developers.

The Avada team released an initial security patch in version 3.15.2 on April 13. Therefore, the first fix arrived approximately three weeks after initial disclosure. The development team then shipped a comprehensive fix addressing both vulnerabilities in version 3.15.3 on May 12.

Wordfence emphasized the critical nature of these security updates. The security firm strongly urged all Avada Builder users to apply the latest version immediately. Delayed patching leaves sites exposed to potential exploitation by malicious actors.

Recommended Security Measures

Site administrators should implement several defensive measures beyond applying the security patch. First, audit all subscriber accounts created during the vulnerability disclosure period. Review account creation dates and activity patterns for suspicious behavior.

Additionally, administrators should consider rotating credentials stored in wp-config.php if compromise is suspected. This precautionary step prevents unauthorized access even if credentials were previously exposed. Changing database passwords and regenerating security keys adds an extra protection layer.

Furthermore, site owners should examine server logs for unusual traffic patterns. Specifically, look for suspicious admin-ajax.php requests that reference the affected shortcode functionality. These log entries may indicate exploitation attempts or successful breaches.

WordPress Security Context

This disclosure adds to Wordfence’s ongoing documentation of Avada Builder security issues. The plugin’s popularity makes it an attractive target for security researchers and malicious actors alike. However, the vendor’s prompt response to this disclosure demonstrates commitment to user security.

WordPress plugin vulnerabilities continue to pose significant risks across the ecosystem. In practice, outdated plugins represent one of the most common attack vectors for WordPress sites. Regular updates and security monitoring remain essential for maintaining site integrity.

The reality is that plugin vulnerabilities affect millions of websites simultaneously. What this means is that coordinated disclosure and rapid patching become critical for ecosystem security. Site administrators must prioritize security updates to protect their digital assets.

Original Source: www.infosecurity-magazine.com