What’s Vulnerable › Vulnerabilities

CVE-2020-28693

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-16 · updated 2026-06-17
• Weakness: CWE-434

Description

An unrestricted file upload issue in HorizontCMS 1.0.0-beta allows an authenticated remote attacker to upload PHP code through a zip file by uploading a theme, and executing the PHP file via an HTTP GET request to /themes/<php_file_name>

Affected products

• Horizontcms Project Horizontcms: 1.0.0-beta

References

• https://github.com/jkana/HorizontCMS-1.0.0-beta-shell-upload
• https://github.com/ttimot24/HorizontCMS/issues/21
• https://github.com/jkana/HorizontCMS-1.0.0-beta-shell-upload
• https://github.com/ttimot24/HorizontCMS/issues/21

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