Vulnerability Details CVE-2021-28428
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 60.8%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 7.5
References
Products affected by CVE-2021-28428
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cpe:2.3:a:horizontcms_project:horizontcms:1.0.0