What is CVE-2026-1509?

CVE-2026-1509 is a medium-severity vulnerability in Themefusion Avada (Fusion) Builder, classified under Code Injection. CVSS score: 5.4/10. Published 2026-04-15.

How severe is CVE-2026-1509?

Medium severity. CVSS v3 base score is 5.4 out of 10.

RCE in Themefusion Avada (Fusion) Builder

CVE-2026-1509

The Avada (Fusion) Builder plugin for WordPress is vulnerable to Arbitrary WordPress Action Execution in all versions up to, and including, 3.15.1. This is due to the plugin's `output_action_hook()` function accepting user-controlled input…

Vulnerability class: RCE (Remote Code Execution)

EPSS: 0.000 (4.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Themefusion Avada (Fusion) Builder — versions 0

Weakness classification (CWE)

CWE-94 — Code Injection

References

www.wordfence.com/threat-intel/vulnerabilities/id/fdc57b06-bae9-49a3-84dd-f5937…
themeforest.net/item/avada-responsive-multipurpose-theme/2833226
avada.com/documentation/avada-changelog/

Frequently asked questions

What is CVE-2026-1509?: CVE-2026-1509 is a medium-severity vulnerability in Themefusion Avada (Fusion) Builder, classified under Code Injection. CVSS score: 5.4/10. Published 2026-04-15.
How severe is CVE-2026-1509?: Medium severity. CVSS v3 base score is 5.4 out of 10.