Known vulnerabilities in k2pdfopt (Debian package) 2.51+ds

2.52+ds-1+b1 2.53+ds-1+b1 2.53+ds-1+b2 2.54+ds-1 2.54+ds-1+b1 2.55+ds-1 2.55+ds-1+b1 2.55+ds-2 2.55+ds-3 2.55+ds-3+b1 2.55+ds-3.1 2.55+ds-3.1+b1 2.55+ds-3.1+b2 2.53+ds 2.53+ds-1 2.52+ds 2.52+ds-1 2.51+ds 2.42+ds-1 2.51+ds-1