CVE-2020-27387
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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 18.5%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 18.46% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- horizontcms project/horizontcms
- Source
- cve@mitre.org
EPSS 18.5% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/160046/HorizontCMS-1.0.0-beta-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
- https://blog.vonahi.io/whats-in-a-re-name/Exploit, Patch, Third Party Advisory
- https://github.com/rapid7/metasploit-framework/pull/14340Third Party Advisory
- https://github.com/ttimot24/HorizontCMS/commit/436b5ab679fd27afa3d99c023dbe103113da4feePatch, Third Party Advisory
- http://packetstormsecurity.com/files/160046/HorizontCMS-1.0.0-beta-Shell-Upload.htmlExploit, Third Party Advisory, VDB Entry
- https://blog.vonahi.io/whats-in-a-re-name/Exploit, Patch, Third Party Advisory
- https://github.com/rapid7/metasploit-framework/pull/14340Third Party Advisory
- https://github.com/ttimot24/HorizontCMS/commit/436b5ab679fd27afa3d99c023dbe103113da4feePatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.