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CVE-2021-28428

CVE information

Published

2 months ago

Last Modified

2 months ago

CVSSv2.0 Severity

High

CVSSv3.1 Severity

Critical

Impact Analysis

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Description

File upload vulnerability in HorizontCMS before 1.0.0-beta.3 via uploading a .htaccess and *.hello files using the Media Files upload functionality. The original file upload vulnerability (CVE-2020-27387) was remediated by restricting the PHP extensions; however, we confirmed that the filter was bypassed via uploading an arbitrary .htaccess and *.hello files in order to execute PHP code to gain RCE..

CVSSv2.0 Score

Severity
High
Base Score
7.5/10
Exploit Score
10/10
Access Vector
Network
Access Complexity
Low
Authentication Required
None
Impact Score
6.4/10
Confidentiality Impact
Partial
Availability Impact
Partial
Integrity Impact
Partial

CVSSv3.1 Score

Severity
Critical
Base Score
9.8/10
Exploit Score
3.9/10
Access Vector
Network
Access Complexity
Low
Privileges Required
None
Impact Score
5.9/10
Confidentiality Impact
High
Availability Impact
High
Integrity Impact
High
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:beta:*:*:*:*
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha:*:*:*:
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha2:*:*:*
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha3:*:*:*
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha4:*:*:*
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha5:*:*:*
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha6:*:*:*
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha7:*:*:*
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha8:*:*:*
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:-:*:*:*:*:*:
  Yes
- -
cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:beta2:*:*:*:
  Yes
- -

References

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1. Download Multipass

sudo snap install multipass

2. Launch a multipass instance

multipass launch -c 2 -m 6G -d 20G -n mageni 20.04 && multipass shell mageni

3. Install Mageni

curl -sL https://www.mageni.net/installation | sudo bash

1. If you don’t have it already, install Brew. Then, to install Multipass simply execute:

brew install --cask multipass

2. Launch a multipass instance

multipass launch -c 2 -m 6G -d 20G -n mageni 20.04 && multipass shell mageni

2. Install Mageni

curl -sL https://www.mageni.net/installation | sudo bash

1. Download the installer for Windows

Note: You need Windows 10 Pro/Enterprise/Education v 1803 or later, or any Windows 10 with VirtualBox

2. Ensure your network is private

Make sure your local network is designated as private, otherwise Windows prevents Multipass from starting.

3. Run the installer

You need to allow the installer to gain Administrator privileges.

4. Launch a multipass instance

multipass launch -c 2 -m 6G -d 20G -n mageni 20.04

5. Log into the multipass instance

multipass shell mageni

6. Install Mageni

curl -sL https://www.mageni.net/installation | sudo bash