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Vulnerability record · CVE-2020-28693 · published 16 November 2020

CVE-2020-28693: Horizontcms project horizontcms unrestricted file upload vulnerability

HHorizontcms Project · Horizontcms

An unrestricted file upload issue in HorizontCMS 1.0.0-beta allows an authenticated remote attacker to upload PHP code through a zip file by uploading a theme, and executing the PHP file via an HTTP GET request to /themes/<php_file_name>

8.8 CVSS 3.1 High EPSS 2.5% · top 15.7% CWE-434 · Unrestricted file upload
8.8CVSS 3.1 base score, v2 9.0
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An unrestricted file upload issue in HorizontCMS 1.0.0-beta allows an authenticated remote attacker to upload PHP code through a zip file by uploading a theme, and executing the PHP file via an HTTP GET request to /themes/<php_file_name>

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/jkana/HorizontCMS-1.0.0-beta-shell-upload ExploitThird Party Advisory
https://github.com/ttimot24/HorizontCMS/issues/21 Third Party Advisory
https://github.com/jkana/HorizontCMS-1.0.0-beta-shell-upload ExploitThird Party Advisory
https://github.com/ttimot24/HorizontCMS/issues/21 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-28428Horizontcms project horizontcms unrestricted file upload vulnerabilityFile upload vulnerability in HorizontCMS before 1.0.0-beta.3 via uploading a .htaccess and *.hello files using the Media Files upload functionality. …EPSS 1.2%8.8CVE-2020-27387Horizontcms project horizontcms unrestricted file upload vulnerabilityAn unrestricted file upload issue in HorizontCMS through 1.0.0-beta allows an authenticated remote attacker (with access to the FileManager) to uploa…EPSS 18%7.5CVE-2022-25104Horizontcms project horizontcms vulnerabilityHorizontCMS v1.0.0-beta.2 was discovered to contain an arbitrary file download vulnerability via the component /admin/file-manager/.EPSS 1.1%10.0CVE-2026-56291Balbooa Forms Joomla extension unauthenticated arbitrary file upload RCEThe Balbooa Forms extension for Joomla before version 2.4.1 accepts file uploads without authentication and does not restrict file type, allowing exe…KEVEPSS 15%analysed10.0CVE-2026-48939iCagenda Joomla extension unrestricted file upload leads to PHP RCEThe iCagenda extension for Joomla fails to restrict file types in its file attachment feature, allowing arbitrary file uploads that result in PHP cod…KEVEPSS 20%analysed10.0CVE-2026-56290Joomla Page Builder CK unauthenticated file upload leads to RCEThe Joomla Page Builder CK extension before 3.6.0 allows unauthenticated arbitrary file uploads, letting an attacker place executable files on the se…KEVEPSS 31%analysed10.0CVE-2026-48908SP Page Builder for Joomla unauthenticated arbitrary file upload RCESP Page Builder for Joomla permits unauthenticated users to upload arbitrary files, which can lead to upload and execution of PHP code. The flaw is a…KEVEPSS 89%analysed9.8CVE-2024-7399Samsung MagicINFO 9 Server path traversal allows arbitrary file writeSamsung MagicINFO 9 Server before version 21.1050 contains a path traversal flaw (CWE-22) that also enables unrestricted file upload (CWE-434), letti…KEVEPSS 92%analysed

Source: NIST National Vulnerability Database (record CVE-2020-28693), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.