Originally published at: https://pressbooks.org/blog/2018/06/26/pressbooks-5-3-4-now-available/
Pressbooks 5.3.4 is now available. This release fixes a just-disclosed WordPress core vulnerability which has not yet been patched in WordPress core. We encourage all Open Source users to update to Pressbooks 5.3.4 as soon as possible or follow the reporter’s instructions to add a temporary fix to your network.