openproject/docs/release-notes/4-0-9/README.md

---
  title: OpenProject 4.0.9
  sidebar_navigation:
      title: 4.0.9
  release_version: 4.0.9
  release_date: 2015-03-25
---


# OpenProject 4.0.9

OpenProject 4.0.9 has been released with an important security bug fix
and several bug fixes. We advise everyone to update their OpenProject
installation.

For details on the security bug fix, please have a look at the following
work package:
[\#19243](https://community.openproject.org/work_packages/19243 "#19243").  
This error also occurred temporarily on the [OpenProject demo
environments](https://start.openproject.com/ "OpenProject demo environments").
However, login information has not been affected by this error.

Thanks to L for pointing out this security error.

In the meeting plugin, a bug has been fixed which caused an internal
error when the notification could not be delivered to one or several of
the recipients
([\#19263](https://community.openproject.org/work_packages/19263 "#19263")).

For further information on the release, please refer to the [Changelog
v.4.0.9](https://github.com/opf/openproject/releases/tag/v4.0.9 "Changelog version 4.0.9") or
take a look
at[GitHub](https://github.com/opf/openproject/tree/v4.0.9 "GitHub").