An unrestricted file upload issue in HorizontCMS through 1.0.0-beta allows an…
Priority MEDIUM 56CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.
Summary
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.
Why it matters now
EPSS 0.18461 97th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha:*:*:*:*:*:* | 1.0.0 alpha | Vulnerable | Horizontcms Project |
| cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha2:*:*:*:*:*:* | 1.0.0 alpha2 | Vulnerable | Horizontcms Project |
| cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha3:*:*:*:*:*:* | 1.0.0 alpha3 | Vulnerable | Horizontcms Project |
| cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha4:*:*:*:*:*:* | 1.0.0 alpha4 | Vulnerable | Horizontcms Project |
| cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha5:*:*:*:*:*:* | 1.0.0 alpha5 | Vulnerable | Horizontcms Project |
| cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha6:*:*:*:*:*:* | 1.0.0 alpha6 | Vulnerable | Horizontcms Project |
| cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha7:*:*:*:*:*:* | 1.0.0 alpha7 | Vulnerable | Horizontcms Project |
| cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha8:*:*:*:*:*:* | 1.0.0 alpha8 | Vulnerable | Horizontcms Project |
| cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:beta:*:*:*:*:*:* | 1.0.0 beta | Vulnerable | Horizontcms Project |
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha:*:*:*:*:*:* Versions 1.0.0 alpha Vulnerable ·Horizontcms Project
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha2:*:*:*:*:*:* Versions 1.0.0 alpha2 Vulnerable ·Horizontcms Project
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha3:*:*:*:*:*:* Versions 1.0.0 alpha3 Vulnerable ·Horizontcms Project
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha4:*:*:*:*:*:* Versions 1.0.0 alpha4 Vulnerable ·Horizontcms Project
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha5:*:*:*:*:*:* Versions 1.0.0 alpha5 Vulnerable ·Horizontcms Project
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha6:*:*:*:*:*:* Versions 1.0.0 alpha6 Vulnerable ·Horizontcms Project
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha7:*:*:*:*:*:* Versions 1.0.0 alpha7 Vulnerable ·Horizontcms Project
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:alpha8:*:*:*:*:*:* Versions 1.0.0 alpha8 Vulnerable ·Horizontcms Project
- cpe:2.3:a:horizontcms_project:horizontcms:1.0.0:beta:*:*:*:*:*:* Versions 1.0.0 beta Vulnerable ·Horizontcms Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27387
- 2026-10-03 Alias added: GHSA-fmrq-56mh-96f5
References
More Horizontcms Project Horizontcms vulnerabilities
- TI-2021-09547 File upload vulnerability in HorizontCMS before 1.0.0-beta.3 via uploading a .htaccess… CVSS 3.1CRITICAL 9.8
- TI-2020-17387 An unrestricted file upload issue in HorizontCMS 1.0.0-beta allows an authenticated… CVSS 3.1HIGH 8.8
- TI-2022-08843 HorizontCMS v1.0.0-beta.2 was discovered to contain an arbitrary file download… CVSS 3.1HIGH 7.5
Sources
- CVE-2020-27387 · CVE Program
- CVE-2020-27387 · NVD
- FIRST EPSS
- GHSA-fmrq-56mh-96f5 · GitHub Advisory Database · CC BY 4.0
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