CVE-2021-28428 - CVE House
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Status published Critical CVE-2021-28428

File upload vulnerability in HorizontCMS before 1.0.0-beta.3 via uploading a...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from horizontcms project

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CVE-2022-25104
HorizontCMS v1.0.0-beta.2 was discovered to contain an arbitrary file download...
High 7.5
CVE-2020-28693
An unrestricted file upload issue in HorizontCMS 1.0.0-beta allows an...
High 8.8
CVE-2020-27387
An unrestricted file upload issue in HorizontCMS through 1.0.0-beta allows...
High 8.8

Affected Vendor

horizontcms project

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Affected Software

horizontcms
Vulnerable Versions:
1.0.0

Timeline

Official Publish: April 5th, 2022
Last Modified: August 3rd, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.