Improper server-side validation in ScreenConnect extension framework
In versions of ScreenConnect™ prior to 25.8, server-side validation and integrity checks within the extension subsystem could allow the installation and execution of untrusted or arbitrary extensions by authorized or administrative users. Abuse of this behavior could result in the execution of custom code on the server or unauthorized access to application configuration data. This issue affects only the ScreenConnect server component; host and guest clients are not impacted. ScreenConnect 25.8 introduces enhanced server-side configuration handling and integrity checks to ensure only trusted extensions can be installed.
Cloud: No action is required. ScreenConnect servers hosted in
“screenconnect.com” cloud (standalone and Automate/RMM integrated) or
“hostedrmm.com” for Automate partners have been updated to remediate the
issue.
On-prem:
* ScreenConnect Partners: Please upgrade to ScreenConnect version 25.8 and update
your guest clients to the same version. Visit Download
| ScreenConnect page to download and apply the update (access
requires a valid on-premises license).
* Automate On-Prem Partners with
ScreenConnect Integration:
Partners using an on-premises ScreenConnect installation integrated with Automate must ensure that the Automate ScreenConnect Extension is updated to version 4.4.0.16 before upgrading the ScreenConnect server to version 25.8. Once confirmed, visit the
Automate Product Updates https://docs.connectwise.com/ConnectWise_Automate_Documentation/Automate_Product_Updates
page to download and apply the ScreenConnect 25.8 update.