CVE-2020-28693

8.8 highEPSS 2.5%

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>

Severity

CVSS 3.1

8.8 high

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

EPSS: 2.5% chance of exploitation in the next 30 days; higher than 84% of CVEs (scores of 2026-10-31)
CWE: CWE-434
Published: 2020-11-16
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

horizontcms_project:horizontcms

References

https://github.com/jkana/HorizontCMS-1.0.0-beta-shell-upload
https://github.com/ttimot24/HorizontCMS/issues/21
https://github.com/jkana/HorizontCMS-1.0.0-beta-shell-upload
https://github.com/ttimot24/HorizontCMS/issues/21

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