# Insecure Remember-Me / Persistent Session

> Detects insecure persistent login implementations using predictable tokens or insufficient expiration policies.

- Skill: `zakirkun/insecure-remember-me-persistent-session` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add zakirkun/insecure-remember-me-persistent-session`
- Raw SKILL.md: https://api.skillmd.com/api/skills/zakirkun/insecure-remember-me-persistent-session/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: zakirkun (https://skillmd.com/u/zakirkun)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/zakirkun/insecure-remember-me-persistent-session

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# Insecure Remember-Me

## Overview
"Remember Me" functionality that uses predictable tokens or stores sensitive data in persistent cookies enables long-lived session hijacking:
- Tokens derived from username+timestamp (predictable)
- Tokens stored without server-side revocation capability
- Tokens valid even after password change
- Long-lived tokens with no rotation on use

## Remediation
- Use cryptographically random 32+ byte tokens stored server-side
- Store only a token reference in the cookie, not user data
- Invalidate remember-me tokens on password change and logout
- Rotate the token on each use to prevent replay attacks