CVE-2019-25025: Rubyonrails Active Record Session Store

Medium severity, CVSS 5.3. EPSS: 1.8% chance of exploitation in the next 30 days.

The activerecord-session_store (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782.

Affected products

• Rubyonrails Active Record Session Store: up to and including 1.1.3

Published 2021-03-05. Last modified 2026-06-17.