[GHSA-f53p-382v-8pj7] The Avada Builder (fusion-builder) plugin for WordPress...

advisories/unreviewed/2026/05/GHSA-f53p-382v-8pj7/GHSA-f53p-382v-8pj7.json

@@ -1,19 +1,37 @@
 {
   "schema_version": "1.4.0",
   "id": "GHSA-f53p-382v-8pj7",
-  "modified": "2026-05-21T06:31:31Z",
+  "modified": "2026-05-21T06:31:41Z",
   "published": "2026-05-21T06:31:31Z",
   "aliases": [
     "CVE-2026-6279"
   ],
-  "details": "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.",
+  "summary": "CVE-2026-6279: Additional nonce exposure vector via fb-edit=1 frontend editing parameter",
+  "details": "The published CVE documents nonce exposure via [fusion_post_cards] and \n[fusion_table_of_contents] shortcodes. Forensic analysis of an active \nexploitation confirms an additional undocumented vector: the fusion_load_nonce \nis also exposed via the fb-edit=1 frontend editing parameter, available on any \npublic URL without requiring specific shortcodes. This makes all Avada Builder \ninstallations up to 3.15.2 universally vulnerable regardless of page configuration.\n\nEvidence: WAF logs confirm exploitation via ?fb-edit=1 parameter on sites with \nno Post Cards or Table of Contents elements present.",
   "severity": [
     {
       "type": "CVSS_V3",
       "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
     }
   ],
-  "affected": [],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "Packagist",
+        "name": ""
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
   "references": [
     {
       "type": "ADVISORY",