CVE-2021-22885: Debian Linux

High severity, CVSS 7.5. EPSS: 4.1% chance of exploitation in the next 30 days.

A possible information disclosure / unintended method execution vulnerability in Action Pack >= 2.0.0 when using the `redirect_to` or `polymorphic_url`helper with untrusted user input.

Affected products

• Debian Debian Linux: version 10.0 only
• Rubyonrails Actionpack Page-Caching: affected versions not specified
• Rubyonrails Rails: from 5.2.0.0, before 5.2.4.6 (fixed in 5.2.4.6); from 6.0.0.0, before 6.0.3.7 (fixed in 6.0.3.7); from 6.1.0.0, before 6.1.3.1 (fixed in 6.1.3.1)

Published 2021-05-27. Last modified 2026-06-17.