Jaspersoft customers can download the latest hotfix from the Cloud Software Group's Support Portal Web UI. 

Once logged on you can find the hotfix under the Download Menu:

AvailableDownloads/Jaspersoft/JasperReports Server/8.1.2/hotfix_JRSPro8.1.2_cumulative_20230818_1425.zip

Direct download link: https://support.tibco.com/s/hotfixes?id=a014z00001CIQbPAAX

For instructions on how Cloud Software Group customers can download / access all available hotfixes, please refer to Article 000022290:  https://support.tibco.com/s/article/hotfix.

For a summary of the updates included, please refer to the attached README file (also included inside the ZIP archive).