VULNERABILITY INTELLIGENCE

CVE-2021-28428

CVSS score9.8 CRITICAL

EPSS probability1.24%

CISA KEVNot currently listed

Published2022-04-05

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

nvd@nist.gov: CWE-434

Primary references

cve@mitre.org — Product
cve@mitre.org — Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Product
af854a3a-2127-422b-91ae-364da2661108 — Patch, Third Party Advisory