CVE-2026-6279
CRITICALAvada (Fusion) Builder <= 3.15.2 - Remote Code Execution via PHP Function Injection
Title source: llmExploitation Summary
EIP tracks 4 public exploits for CVE-2026-6279. PoCs published by 87achrafg-stack, zycoder0day, xxconi.
AI-analyzed exploit summary This Python script exploits CVE-2026-6279, an unauthenticated RCE vulnerability in Avada Builder <= 3.15.2 via call_user_func() abuse. It automates nonce extraction, Cloudflare bypass, and payload delivery for RCE.
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.
Exploits (4)
This Python script exploits CVE-2026-6279, an unauthenticated RCE vulnerability in Avada Builder <= 3.15.2 via call_user_func() abuse. It automates nonce extraction, Cloudflare bypass, and payload delivery for RCE.
This repository contains a functional Python exploit for CVE-2026-6279, targeting an unauthenticated RCE vulnerability in Avada Builder <= 3.15.2 via a call_user_func() injection chain. The exploit includes detailed nonce extraction logic and payload delivery mechanisms.
This repository contains a functional exploit for CVE-2026-6279, targeting Avada Builder <= 3.15.2. The exploit leverages a deterministic nonce, unauthenticated AJAX endpoint, and deserialization to achieve RCE via call_user_func() without an allowlist.
This repository contains a functional exploit for CVE-2026-6279, an unauthenticated RCE vulnerability in Avada Builder. The exploit retrieves a nonce from the target site and crafts a malicious payload to execute arbitrary commands via PHP functions like 'system' or 'exec'.
References (12)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H