Avada <= 7.16 and Fusion Builder <= 3.16 - Unauthenticated Remote Code Execution via Arbitrary File Write
The Avada theme for WordPress is vulnerable to Arbitrary File Write in all versions up to, and including, 7.16 when the Fusion Builder plugin is installed and active in versions up to, and including, 3.16. This is due to a chain of authorization and input validation weaknesses across the two components that makes it possible for unauthenticated attackers to write attacker-controlled files to the server. This can be used to create and execute arbitrary PHP files, resulting in remote code execution and complete site compromise. Successful exploitation requires both Avada and Fusion Builder to be installed and active, as well as certain administrator-authored content to be present.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Avada (Fusion) Builder | <= 3.16 | 3.16.1 |
| WordPress theme | Avada | Website Builder For WordPress & WooCommerce | <= 7.16 | 7.16.1 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-862- Platform
- WordPress
- Package
Avada (Fusion) Builder, Avada | Website Builder For WordPress & WooCommerce- Disclosed
- 25.08.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 5bef5bd3-8ec9-4a5b-bcdd-98952c7ef390 - Wordfence Intelligence
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Copyright 2012-2026 Defiant Inc.
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Vulnerability history: Avada (Fusion) Builder
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 30
- First → latest
- 04.2022 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 4
- High 7
- Medium 19
Disclosures per year
- 2022: 1
- 2023: 4
- 2024: 2
- 2025: 5
- 2026: 18
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