CVE-2021-25074: WordPress WebP Converter for Media < 4.0.3 - Unauthenticated Open Redirect

id: CVE-2021-25074

info:
  name: WordPress WebP Converter for Media < 4.0.3 - Unauthenticated Open Redirect
  author: dhiyaneshDk
  severity: medium
  description: WordPress WebP Converter for Media < 4.0.3 contains a file (passthru.php) which does not validate the src parameter before redirecting the user to it, leading to an open redirect issue.
  impact: |
    An attacker can trick users into visiting a malicious website, leading to potential phishing attacks or the disclosure of sensitive information.
  remediation: |
    Update to the latest version of the WordPress WebP Converter for Media plugin (4.0.3) or remove the plugin if not needed.
  reference:
    - https://wpscan.com/vulnerability/f3c0a155-9563-4533-97d4-03b9bac83164
    - https://nvd.nist.gov/vuln/detail/CVE-2021-25074
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/ARPSyndicate/cvemon
  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-2021-25074
    cwe-id: CWE-601
    epss-score: 0.01001
    epss-percentile: 0.76203
    cpe: cpe:2.3:a:webp_converter_for_media_project:webp_converter_for_media:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 1
    vendor: webp_converter_for_media_project
    product: webp_converter_for_media
    framework: wordpress
  tags: cve2021,cve,redirect,wp-plugin,webpconverter,wpscan,wordpress,webp_converter_for_media_project

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-content/plugins/webp-converter-for-media/includes/passthru.php?src=https://interact.sh"

    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)(?:[a-zA-Z0-9\-_\.@]*)interact\.sh\/?(\/|[^.].*)?$' # https://regex101.com/r/L403F0/1
# digest: 4b0a00483046022100cb7bb66553eb72b9e95a259e496a3e56a49b843e72ba34bc99c31383485f5a51022100cd4f1b6aaf27f595dd22aa404600b9af7a04a773fb223255cde7a6d7b4e2ec2c:922c64590222798bb761d5b6d8e72950