Jaspersoft customers will be able to download the hotfix from the TIBCO Support Customer Portal Web UI using their username and password for the TIBCO Support Web page.
Once logged on you can find the hot fix under the Download Menu:
AvailableDownloads/Jaspersoft/JasperReports Server/7.5.2/hotfix_JRSPro7.5.2_cumulative_20211220_0924.zip
Direct download link: https://support.tibco.com/s/hotfixes?id=a014z00000yU9cVAAS
For instructions on how can TIBCO customers download / access all GA hotfixes, 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).