---
id: CVE-2021-36582
title: >-
  In Kooboo CMS 2.1.1.0, it is possible to upload a remote shell (e.g., aspx) to
  the server and then call upon it to receive a reverse shell from the victim
  server
summary: >-
  In Kooboo CMS 2.1.1.0, it is possible to upload a remote shell (e.g., aspx) to
  the server and then call upon it to receive a reverse shell from the victim
  server. The files are uploaded to /Content/Template/root/reverse-shell.aspx
  and ca…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-434
vendor: kooboo
product: kooboo_cms
affected:
  - kooboo_cms = 2.1.1.0
published: '2021-09-14'
updated: '2026-07-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-36582'
references:
  - url: 'https://github.com/l00neyhacker/CVE-2021-36582'
    label: cve@mitre.org
  - url: 'http://kooboo.com'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/l00neyhacker/CVE-2021-36582'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01483
epssPercentile: 0.72839
ingestedAt: '2026-07-06T17:03:23.568Z'
---

## Overview

In Kooboo CMS 2.1.1.0, it is possible to upload a remote shell (e.g., aspx) to the server and then call upon it to receive a reverse shell from the victim server. The files are uploaded to /Content/Template/root/reverse-shell.aspx and can be simply triggered by browsing that URL.

## Affected

- `kooboo_cms = 2.1.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.