Synapse 1.120.2 was just released with several security fixes: github.com/element-hq/synapse/…
You should really update now and while the last 2 CVEs say, they were fixed on 1.106, to my knowledge that is only true if you enabled authenticated media, which only became the default in 1.120, so you really want to update even for those or at least update your config.

Thank you! :)

#matrix #synapse #security