Arbitrary file upload in Horizontcms Project
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.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.012 (68.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
- Horizontcms Project — versions 1.0.0
Weakness classification (CWE)
References
- github.com/ttimot24/HorizontCMS (Product)
- github.com/ttimot24/HorizontCMS/commit/9c4d6827cbe96decec6834d53660e14ab2bf8838 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28428?
- CVE-2021-28428 is a critical-severity vulnerability in Horizontcms Project, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2022-04-05.
- How severe is CVE-2021-28428?
- Critical severity. CVSS v3 base score is 9.8 out of 10.