CVE-2020-27387
8.8 · HIGHOverview
CVE-2020-27387 is a high-severity vulnerability affecting horizontcms_project horizontcms. It was published on November 5, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from horizontcms_project. Update horizontcms to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|
References
Frequently Asked Questions
What is CVE-2020-27387?
CVE-2020-27387 is a high-severity vulnerability affecting horizontcms_project horizontcms. It was published on November 5, 2020 and has a CVSS 3.1 base score of 8.8 (HIGH).
How severe is CVE-2020-27387?
This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2020-27387?
Check the references section for vendor advisories and patches from horizontcms_project. Update horizontcms to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-27387?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-27387 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related HIGH CVEs from 2020
View all →The Richtext Editor in Pega Platform before 8.2.6 is affected by a Stored Cross-Site Scripting (XSS)
Pega Platform before version 8.2.6 is affected by a Stored Cross-Site Scripting (XSS) vulnerability
In PrestaShop from version 1.5.0.0 and before version 1.7.6.6, the authentication system is malforme
The Table Filter and Charts for Confluence Server app before 5.3.25 (for Atlassian Confluence) allow
<p>A tampering vulnerability exists when Microsoft SharePoint Server fails to properly handle profil
Yii 2 (yiisoft/yii2) before version 2.0.38 is vulnerable to remote code execution if the application
OpenSlides is a free, Web-based presentation and assembly system for managing and projecting agenda,
libsixel 1.8.4 has an integer overflow in sixel_frame_resize in frame.c.
Cross-site request forgery (CSRF) vulnerability in Opsview before 4.4.1 and Opsview Core before 2013
ngiflib 0.4 has a heap-based buffer over-read in GifIndexToTrueColor in ngiflib.c.
obs-server before 1.7.7 allows logins by 'unconfirmed' accounts due to a bug in the REST api impleme
SQL injection vulnerability in the Jomres (com_jomres) component before 7.3.1 for Joomla! allows rem