• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
    If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
  • We plan to deprecate and remove the support for XML RPC protocol versions earlier than 1.6.9.1 in Plesk Obsidian 18.0.82. We strongly recommend that you update all existing integrations using earlier versions of the XML RPC protocol to comply with the version 1.6.9.1 specification.

Sitebuilder 4.5 new hotfix6 released

Michele, you can check general information about hotfix in wikipedia, for example: http://en.wikipedia.org/wiki/Hotfix
Parallels Plesk Sitebuilder hotfix is just a number of patches which are applied on running system without major updates on a product. In general, this is a list of patched files which uploaded into the server instead of old ones and fix some issues in current product version.
 
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