CVE-2026-6279

216.73.217.22

· Published 21/05/2026 05:16 · Modified 21/05/2026 15:19

Labels: CVE-2026-6279 2026-05-21 CVE-2026-6279 CWE-74 [email protected]

Essential information

Published: 21/05/2026 05:16
Modified: 21/05/2026 15:19
Author: —
Creator: —
CVSS: 9.8 CRITICAL (v3.1)
CISA KEV: No
CWE: —
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS metrics

Description

The Avada Builder (fusion-builder) plugin for WordPress is vulnerable to Unauthenticated Remote Code Execution via PHP Function Injection in versions up to and including 3.15.2. This is due to the `wp_conditional_tags` case in `Fusion_Builder_Conditional_Render_Helper::get_value()` passing attacker-controlled values from a base64-decoded JSON blob directly to `call_user_func()` without any allowlist validation. This is exploitable by unauthenticated attackers through the `fusion_get_widget_markup` AJAX endpoint, which is registered for non-privileged (unauthenticated) users via `wp_ajax_nopriv_fusion_get_widget_markup`. The endpoint is protected only by a nonce (`fusion_load_nonce`), but this nonce is generated for user ID 0 and is deterministically exposed in the JavaScript output of any public-facing page containing a Post Cards (`[fusion_post_cards]`) or Table of Contents (`[fusion_table_of_contents]`) element. This makes it possible for unauthenticated attackers to execute arbitrary code on affected sites.

NVD status

Status: Deferred — CVE has been recently published to the CVE List and has been received by the NVD.
Source: [email protected]
NVD: View on NVD

Affected products (CPE)

Product	CPE
avada / avada builder	`cpe:2.3:a:avada:avada_builder:3.15.2:::::wordpress::`
avada / avada builder	`cpe:2.3:a:avada:avada_builder::::::wordpress::*`