CSRF Vulnerability in Sessions Helper Exposes User Authentication Tokens

A security scan has flagged a Cross-Site Request Forgery (CSRF) vulnerability within a core authentication file, posing a medium-severity risk to application security. The flaw resides in the `app/helpers/sessions_helper.rb` file, where two instances of cookie creation lack essential security flags. Specifically, the `cookies.permanent[:remember_token]` and `cookies.permanent.encrypted[:user_id]` assignments on lines 11 and 12 are missing the `secure`, `httponly`, and `samesite` attributes. This misconfiguration, classified under OWASP A05:2021 for Security Misconfiguration, could allow attackers to forge unauthorized requests on behalf of authenticated users.

The vulnerability directly impacts the application's session management layer, a critical component for user identity and access control. Without the proper flags, sensitive tokens like `remember_token` and encrypted user IDs are not adequately protected against interception or misuse in cross-site scenarios. The scanner assessed the finding with 80% confidence, indicating a high likelihood of the flaw being exploitable under certain conditions.

This exposure necessitates immediate review by development and security teams. While the severity is currently rated as medium, the location of the flaw in authentication logic elevates its potential impact. Failure to implement the recommended security best practices could leave user accounts and session integrity vulnerable to compromise, requiring patches to enforce secure cookie handling across the application.