WordPress AnyComment <0.3.5 - Open Redirect

id: CVE-2021-24838

info:
  name: WordPress AnyComment <0.3.5 - Open Redirect
  author: noobexploiter
  severity: medium
  description: |
    WordPress AnyComment plugin before 0.3.5 contains an open redirect vulnerability via an API endpoint which passes user input via the redirect parameter to the wp_redirect() function without being validated. An attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    An attacker can trick users into visiting a malicious website, leading to potential phishing attacks or the execution of other malicious activities.
  remediation: |
    Update to the latest version of WordPress AnyComment plugin (0.3.5 or higher) to fix the open redirect vulnerability.
  reference:
    - https://wpscan.com/vulnerability/562e81ad-7422-4437-a5b4-fcab9379db82
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24838
    - https://github.com/ARPSyndicate/cvemon
    - 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-2021-24838
    cwe-id: CWE-601
    epss-score: 0.00106
    epss-percentile: 0.43227
    cpe: cpe:2.3:a:bologer:anycomment:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: bologer
    product: anycomment
    framework: wordpress
  tags: cve2021,cve,redirect,anycomment,wpscan,wordpress,wp-plugin,bologer

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-json/anycomment/v1/auth/wordpress?redirect=https://interact.sh"
      - "{{BaseURL}}/wp-json/anycomment/v1/auth/wordpress?redirect=https://interact.sh?a=https://interact.sh"

    stop-at-first-match: true

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

      - type: status
        status:
          - 302
# digest: 4a0a00473045022071227d1361f32f5ff9354a3887ff0536eb287e035f3bee849fbd26799874a89b022100eacf4cb81d3e76c4084196efdece913cdc78100ad1664aef9d5f9b3b5ce486cc:922c64590222798bb761d5b6d8e72950