iTextPDF in iText 7 and up to (excluding 4.4.13.3) 7.1.17 allows command injection via a CompareTool filename that is mishandled on the gs (aka Ghostscript) command line in GhostscriptHelper.java.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-43113.json"