Provide references for CVE-2021-37819.
Where can I find more information about CVE-2021-37819?
References are available at: https://gitlab.com/pdftk-java/pdftk/-/merge_requests/21/diffs?commit_id=9b0cbb76c8434a8505f02ada02a94263dcae9247#diff-content-b3cfd29983c793bcae2375502abd5baa8f5d1081.