pdftops.pl before 1.20 in alternate pdftops filter allows local users to overwrite arbitrary files via a symlink attack on the pdfin.[PID].tmp temporary file, which is created when pdftops reads a PDF file from stdin, such as when pdftops is invoked by CUPS.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 19.9%