# Avada Builder Plugin Flaws Expose Credentials and Database Secrets on Nearly One Million WordPress Sites
A pair of critical vulnerabilities in the Avada Builder WordPress plugin — affecting approximately one million active installations — enable attackers to steal site credentials, extract sensitive database information, and potentially achieve full website takeover. The flaws, discovered by security researcher Rafie Muhammad and disclosed through the Wordfence Bug Bounty Program, highlight persistent validation gaps in popular page builder extensions.
## The Threat
Two distinct vulnerabilities in the Avada Builder plugin create a two-pronged attack surface for WordPress site owners:
| Vulnerability | CVE | Severity | Authentication Required | Affected Versions | Impact |
|---|---|---|---|---|---|
| Arbitrary File Read | CVE-2026-4782 | Medium | Yes (Subscriber+) | Through 3.15.2 | Read wp-config.php, extract DB credentials |
| Time-Based Blind SQL Injection | CVE-2026-4798 | High | No | Through 3.15.1 | Extract password hashes, user data from database |
The arbitrary file read vulnerability is particularly dangerous because wp-config.php — WordPress's core configuration file — typically contains:
Access to these credentials can enable attackers to bypass WordPress authentication entirely and gain administrative control without needing to crack passwords.
The SQL injection flaw operates through a blind injection attack, meaning attackers extract data without receiving direct query results. Instead, they craft requests that use time delays to infer database contents character-by-character — a slow but reliable technique for extracting sensitive information.
## Background and Context
Avada Builder is a drag-and-drop page builder integrated with the Avada WordPress theme, one of the most popular premium themes in the WordPress ecosystem. The plugin allows site administrators and editors to construct complex page layouts and design custom website elements without writing code. This accessibility has contributed to its widespread adoption across approximately one million active installations.
Timeline of the Disclosure:
Muhammad received bug bounty payments of $3,386 for the file read vulnerability and $1,067 for the SQL injection, demonstrating that Wordfence's coordinated disclosure process continues to incentivize responsible vulnerability reporting in the WordPress plugin ecosystem.
## Technical Details
### Arbitrary File Read (CVE-2026-4782)
The first flaw exists in the plugin's shortcode-rendering functionality, specifically through improper validation of the custom_svg parameter. The vulnerability allows any user with subscriber-level access — the lowest authenticated role in WordPress — to specify arbitrary file paths and retrieve their contents.
Why subscriber-level access is a weak barrier:
Many WordPress sites implement open user registration, treating subscriber accounts as a default permission tier for commenters and newsletter subscribers. Attackers can register as subscribers without administrative intervention, then exploit this flaw to read sensitive files across the server's filesystem.
The vulnerability bypasses file type validation, meaning attackers can read not only SVG files (the intended use case) but also:
### SQL Injection (CVE-2026-4798)
The second vulnerability exploits improper input handling in the product_order parameter, which the plugin directly inserts into SQL ORDER BY clauses without parameterized query preparation. This creates a classic SQL injection vector that unauthenticated attackers can exploit.
The injection is time-based and blind, requiring attackers to:
1. Craft requests that cause conditional database delays
2. Measure response times to infer true/false conditions
3. Extract database contents one character at a time
4. Build a complete picture of password hashes, user emails, and other sensitive data
Critical prerequisite: Exploitation is only possible if the site previously used WooCommerce (WordPress's popular e-commerce plugin) and then deactivated it, while leaving WooCommerce database tables intact. This unusual condition may explain why the vulnerability went undetected in production for an extended period — the attack surface only exists in sites with a specific historical configuration.
## Implications for Site Owners
### Immediate Risks
Sites running Avada Builder versions 3.15.2 or earlier face multiple attack scenarios:
### Industry Exposure
The scale of the vulnerability is significant: one million active installations represents a massive potential attack surface. Unlike vulnerabilities in core WordPress (which automatically push security updates), plugin vulnerabilities depend on site owners manually updating — a process that frequently lags, particularly on older or abandoned sites.
This vulnerability joins a growing pattern of page builder security gaps. Similar flaws have affected:
Page builders occupy a critical position in the WordPress stack — they have broad file system and database access by design, making security validation essential.
## Recommendations
### For Site Administrators
Immediate (Next 24 Hours):
Short-term (This Week):
Ongoing:
### For WordPress Security Teams
### For Hosting Providers
custom_svg, file_path, etc.)## What Comes Next
Avada Builder's vendor has demonstrated reasonable responsiveness, releasing a partial patch within three weeks of notification and a complete fix within seven weeks. However, the real-world impact depends on adoption — security research suggests that 30-40% of WordPress sites fail to apply available security patches within 30 days.
Site owners should treat this as a critical update requiring immediate attention, particularly those accepting user registrations or storing sensitive customer data.
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## HackWire Analysis
The Avada Builder vulnerabilities expose a structural weakness in WordPress security culture: page builders have become critical infrastructure in the WordPress ecosystem, yet they receive less scrutiny than they deserve. With one million active installations, a single flaw affects more websites than many critical infrastructure components. Yet vulnerability reports in page builders typically receive less media coverage and remediation urgency than equivalent flaws in smaller plugins.
The timing matters here. The file read flaw requires only subscriber-level access — a barrier so low it's negligible on sites with open registration, which remain common despite security best practices. The SQL injection, while requiring WooCommerce history, demonstrates how plugin deactivation can create lingering attack surfaces. Developers often assume that deactivating a plugin removes its risk, but orphaned database tables and code paths can persist for years.
What other reporting is missing: this vulnerability likely exists in other page builders using similar patterns. The shortcode parameter validation gap (CVE-2026-4782) is a category of error seen across multiple WordPress plugins. Organizations relying on page builders should assume competitors may have identical or similar flaws waiting to be discovered. A security audit of your page builder's file handling is overdue.
For defenders, the concrete action is this: Page builders shouldn't have subscriber-level access to arbitrary file read operations. That's architectural — it's not something a patch can fully fix. Site owners should assume that page builder vulnerabilities will recur and implement compensating controls: restrict subscriber registration, use file integrity monitoring on wp-config.php and related configuration files, and segment database access so that a single set of credentials doesn't grant full database access.
— HackWire Editorial
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