Users can type more than 2 digits in the card expiration field

[codeman9]

If the user types in an invalid expiration year (one that is in the past, say "11") then they will be able to enter 4 digits into the field.

[dgoldman-pdx]

Thanks, @codeman9.

The original intention was to allow users to enter either a 2-digit year (16) or a 4-digit year (2016). But the expiration-date-checking code has been modified here and there over time, and now needs a bit of tidying up.

[dgoldman-pdx]

Fixed in version 5.0.4.

Thanks again, @codeman9, for bringing this to our attention.