# Ghost v4.20.4 — Release & Upgrade Intelligence
- **Product:** Ghost (https://ghost.org)
- **Version:** v4.20.4
- **Released:** Oct 26, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/ghost/updates/v4.20.4/

## Executive Summary (TL;DR)
Ghost v4.20.4. Source highlight: 🐛 Fixed 500 error when visiting an email-only post link - Naz

## Bug Fixes
- 🐛 Fixed 500 error when visiting an email-only post link - Naz
- 🐛 Fixed GScan crash on files starting with package.json - Thibaut Patel
- 🐛 Fixed GScan falsely triggering the "unused theme setting" error - Thibaut Patel
- 🐛 Fixed error from custom settings sync when theme name contains `.` chars - Kevin Ansfield