CVSS 3.1
8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2020-27387
High (8.8) in horizontcms project horizontcms. EPSS 18% chance of exploitation in the next 30 days.
An unrestricted file upload issue in HorizontCMS through 1.0.0-beta allows an authenticated remote attacker (with access to the FileManager) to upload and execute arbitrary PHP code by uploading a PHP payload, and then using the FileManager's rename function to provide the payload (which will receive a random name on the server) with the PHP extension, and finally executing the PHP file via an HTTP GET request to /storage/<php_file_name>. NOTE: the vendor has patched this while leaving the version number at 1.0.0-beta.
Severity
- EPSS
- 18% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)
- CWE
- CWE-434
- Published
- Modified
- Record from
- the NVD, synced
Affected
- horizontcms_project:horizontcms
References
- http://packetstormsecurity.com/files/160046/HorizontCMS-1.0.0-beta-Shell-Upload.html
- https://blog.vonahi.io/whats-in-a-re-name/
- https://github.com/rapid7/metasploit-framework/pull/14340
- https://github.com/ttimot24/HorizontCMS/commit/436b5ab679fd27afa3d99c023dbe103113da4fee
- http://packetstormsecurity.com/files/160046/HorizontCMS-1.0.0-beta-Shell-Upload.html