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.
Products affected by CVE-2021-28428
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha2:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha3:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha4:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha5:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha6:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha7:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha8:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:beta:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:-:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-28428
0.22%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 60 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-28428
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2021-28428
-
The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-28428
-
https://github.com/ttimot24/HorizontCMS
GitHub - ttimot24/HorizontCMS: Lightweight CMS built on Laravel 8, VueJs 2.6 and Bootstrap 5.1. An alternative platform to OctoberCMSProduct
-
https://github.com/ttimot24/HorizontCMS/commit/9c4d6827cbe96decec6834d53660e14ab2bf8838
#30 - Security fix: File extension bypass · ttimot24/HorizontCMS@9c4d682 · GitHubPatch;Third Party Advisory
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