Introduction to Avada Builder Vulnerabilities
The Avada Builder plugin for WordPress, with an estimated one million active installations, has been found to have two significant vulnerabilities. These flaws, tracked as CVE-2026-4782 and CVE-2026-4798, can be exploited to read arbitrary files and extract sensitive information from the database, respectively.
Arbitrary File Read Vulnerability (CVE-2026-4782)
The first vulnerability, CVE-2026-4782, can be exploited by authenticated users with at least subscriber-level access to read the contents of any file on the server. This is possible due to the plugin’s shortcode-rendering functionality and the custom_svg parameter not properly validating file types or sources. As a result, sensitive files such as wp-config.php, which typically contains database credentials and cryptographic keys, can be accessed.
Access to wp-config.php can lead to the compromise of an administrator account and full site takeover. Although this flaw received a medium-severity rating because it requires subscriber-level access, many WordPress sites offer user registration, which does not represent a significant barrier to exploitation.
SQL Injection Vulnerability (CVE-2026-4798)
The second issue, CVE-2026-4798, is a time-based blind SQL injection flaw that affects Avada Builder versions through 3.15.1. This vulnerability exists because user-controlled input from the product_order parameter was inserted into an SQL ORDER BY clause without proper query preparation. The flaw can be exploited by unauthenticated attackers to extract sensitive information from the site database, including password hashes.
However, the exploitation of this vulnerability requires a specific condition: the WooCommerce e-commerce plugin for WordPress must have been enabled and then deactivated, and its database tables must be intact.
Discovery and Patching
The two vulnerabilities were discovered by security researcher Rafie Muhammad, who reported them through the Wordfence Bug Bounty Program. Muhammad received $3,386 and $1,067 for the findings, respectively. The vulnerabilities were submitted to Wordfence on March 21 and reported to the Avada Builder publisher on March 24.
A partial fix, version 3.15.2, was released on April 13, while the fully patched version 3.15.3 was released on May 12. Impacted website owners and administrators are advised to update to Avada Builder version 3.15.3 as soon as possible to prevent potential exploits.
Conclusion and Recommendations
The vulnerabilities in the Avada Builder plugin highlight the importance of keeping WordPress plugins up to date and being aware of potential security risks. Website owners and administrators should prioritize updating to the latest version of the plugin to prevent arbitrary file reads and SQL injection attacks.
In addition to updating the plugin, it is essential to follow best practices for WordPress security, including using strong passwords, limiting user access, and regularly monitoring site activity for suspicious behavior.
- Update Avada Builder to version 3.15.3 or later.
- Use strong passwords and limit user access to the site.
- Regularly monitor site activity for suspicious behavior.
- Keep all WordPress plugins and themes up to date.
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Source: BleepingComputer