The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: libqt5svg5 5.9.5-0ubuntu1.1 In general, a standard system update will make all the necessary changes.
CVE-2018-19869, CVE-2021-3481, CVE-2021-45930
https://launchpad.net/ubuntu/+source/qtsvg-opensource-src/5.9.5-0ubuntu1.1
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