What’s Vulnerable › Vulnerabilities

CVE-2020-8163

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 82.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-07-02 · updated 2026-06-17
• Weakness: CWE-94

Description

The is a code injection vulnerability in versions of Rails prior to 5.0.1 that wouldallow an attacker who controlled the `locals` argument of a `render` call to perform a RCE.

Affected products

• Debian Linux: 9.0
• Ruby on Rails: before 5.0.1 — fixed in 5.0.1

How to fix

Upgrade to a fixed version: Ruby on Rails 5.0.1. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/158604/Ruby-On-Rails-5.0.1-Remote-Code-Execution.html
• https://groups.google.com/g/rubyonrails-security/c/hWuKcHyoKh0
• https://hackerone.com/reports/304805
• https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html
• http://packetstormsecurity.com/files/158604/Ruby-On-Rails-5.0.1-Remote-Code-Execution.html
• https://groups.google.com/g/rubyonrails-security/c/hWuKcHyoKh0
• https://hackerone.com/reports/304805
• https://lists.debian.org/debian-lts-announce/2020/07/msg00013.html

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