I wrote a blog post how I fixed it:
https://blog.bigsmoke.us/2023/06/18/upgrading-roundcube-on-ubuntu-18.04-and-ubuntu-20.04
Roundcube is a forgotten package. I also saw that Debian has this security update that Ubuntu didn't get:
https://lists.debian.org/debian-lts-announce/2024/06/msg00008.html
I wrote a blog post how I fixed it:
https:/ /blog.bigsmoke. us/2023/ 06/18/upgrading -roundcube- on-ubuntu- 18.04-and- ubuntu- 20.04
Roundcube is a forgotten package. I also saw that Debian has this security update that Ubuntu didn't get:
https:/ /lists. debian. org/debian- lts-announce/ 2024/06/ msg00008. html