ports tree not updating anymore?

[Marwan Sultan]

Good day/evening FreeBSD gurus.

Im on 12.2-R
i used to update my ports tree with portmaster -aBCd
i cannot do it anymore, it says my ports tree is up to date, but i know for a fact that its not.

pkg audit -F reports that some installed packages has a serious vulnerabilities
but portmaster and portsnap utilities says all are up to date!.

please advise what should i do to update the outdated ports and what has been changed with FreeBSD.

thank you
-Marwan