Generally, WI Zoom versions for the latest Minecraft release and for the latest Minecraft snapshot are supported.
Older versions are decided on a case-by-case basis, depending on the severity of the exploit.
You can report a vulnerability by sending an email to contact.wurstimperium@gmail.com.
If you want to encrypt your email with PGP (you don't have to), then you can find my public key below:
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-----END PGP PUBLIC KEY BLOCK-----