WordPress 6.9.6 was released on August 6 as a security release addressing several vulnerabilities. WordPress recommends that sites update to this release immediately.
We have tested the latest version of Pressbooks with WordPress 6.9.6 and confirmed that they are compatible.
As of August 7, all Pressbooks-hosted instances in our infrastructure have been updated to WordPress 6.9.6.
We strongly recommend that administrators of self-hosted and Open Source Pressbooks installations update to WordPress 6.9.6 as soon as possible to ensure that their sites receive the latest security fixes.
For more information about the security fixes included in WordPress 6.9.6, please see the official WordPress release documentation which is available here: