Upgrade 13.4.0 to 13.4.1
URL Rewriter Config Change
In Bloomreach Experience Manager v13.4.1, the default configuration property skippedprefixes of the URL Rewriter plugin have changed. If your project uses custom configuration settings for this plugin, which have not been registered in your project's YAML sources, you must register them there before the upgrade, or your changes will be reset to the default values during the upgrade.
The change to the default configuration is that the value _cmssessioncontext has been added to the old list of values.
Woodstox XML Processor Version Downgrade
The Woodstox XML processing library bundled with the brXM product has been downgraded as part of a related change in the Apache CXF library v3.3.4. Please take special care with upgrading your project as there may be backwards incompatible changes related to this transitive dependency change.
New Defaults for Relevance Data Retention
The default number of days to retain relevance data have changed. Check the defaults for SQL stores and the Elasticsearch store to see if you need to change them to suit your needs.