CVE-2020-8159: Debian Linux

Critical severity, CVSS 9.8. EPSS: 5.4% chance of exploitation in the next 30 days.

There is a vulnerability in actionpack_page-caching gem < v1.2.1 that allows an attacker to write arbitrary files to a web server, potentially resulting in remote code execution if the attacker can write unescaped ERB to a view.

Affected products

• Debian Debian Linux: version 9.0 only
• Rubyonrails Actionpack Page-Caching: before 1.2.1 (fixed in 1.2.1)

Published 2020-05-12. Last modified 2026-06-17.