Hi Cedric and all other users.
- SPPB 3.8.10 don't have upload custom Icon feature, so found security problem don't effect 3.x version.
- We don't support old versions anymore. End of the life. We informed about that in documenation.
- Consider using Firewall component for Joomla 3.x to add extra security layer anyway!
Regarding the recently reported security issue in SPPB 5.x and SPPB 6.6.1, the affected functionality is not available in SP Page Builder 3.x, including version 3.8.1-10 and 4.x. Therefore, websites running SP Page Builder 3.8.x are not impacted by this specific vulnerability.
Please note that SP Page Builder 3 and Joomla 3.x is no longer under active development and has reached the end of its development lifecycle. As a result, no bug fixes, or security updates are planned for those versions. You are using this on your own risk!