{“lastseen”:””,”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.”,”published”:”2026-05-21T04:27:57.613Z”,”modified”:”2026-05-21T04:27:57.613Z”,”type”:”cve”,”title”:”Avada (Fusion) Builder \\u003c= 3.15.2 – Unauthenticated Remote Code Execution via PHP Function Injection via ‘render_logics’ Shortcode Attribute via Widget AJAX Handler”,”source”:”Wordfence”,”references”:”https:\/\/www.wordfence.com\/threat-intel\/vulnerabilities\/id\/5dc72d78-d47c-4b36-8d69-8672e15ddf8c?source=cve\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/trunk\/inc\/helpers\/class-fusion-builder-conditional-render-helper.php#L1531\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/tags\/3.15.0\/inc\/helpers\/class-fusion-builder-conditional-render-helper.php#L1531\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/trunk\/shortcodes\/fusion-widget.php#L44\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/tags\/3.15.0\/shortcodes\/fusion-widget.php#L44\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/trunk\/shortcodes\/fusion-widget.php#L389\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/tags\/3.15.0\/shortcodes\/fusion-widget.php#L389\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/trunk\/inc\/class-fusion-builder.php#L7551\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/tags\/3.15.0\/inc\/class-fusion-builder.php#L7551\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/trunk\/inc\/helpers\/class-fusion-builder-conditional-render-helper.php#L1083\\nhttps:\/\/plugins.trac.wordpress.org\/browser\/fusion-builder\/tags\/3.15.0\/inc\/helpers\/class-fusion-builder-conditional-render-helper.php#L1083\\nhttps:\/\/avada.com\/documentation\/avada-changelog\/”,”id”:”CVE-2026-6279″,”bulletinFamily”:””,”cwe”:[“CWE-74″],”cvelist”:null,”sourceData”:”themefusion Avada (Fusion) Builder 0″,”sourceHref”:””,”cvss”:{“score”:9.8,”severity”:”CRITICAL”,”vector”:”CVSS:3.1\/AV:N\/AC:L\/PR:N\/UI:N\/S:U\/C:H\/I:H\/A:H”,”version”:”3.1″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”Avada (Fusion) Builder”,”version”:”3.15.2″,”vendor”:”themefusion”,”ai_description”:”Unauthenticated Remote Code Execution via PHP Function Injection in Avada Builder plugin”,”ai_severity”:”Critical”,”ai_vendor”:”ThemeFusion”,”ai_product”:”Avada Builder”,”ai_version”:”3.15.2″,”ai_score”:9.8}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:””,”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….<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[9,6,8,35,12,13,7,11,5],"class_list":["post-55992","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-critical","tag-cve","tag-cvss","tag-cvss-98","tag-exploit","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n