@daviding Do you ever get the wrong invite code warning message when submitting the registration form?
@themaster5_07 Yes, the wrong invite code message does come up on the first attempt. It could be that a subsequent attempt succeeds. The number of requests coming through has gone down, but they still come through, possibly on second or third try.
I believe the issue to be related to the plugin New User Approve by Josh Harrison. After reading the first review:
sudden spam flood
By zorbon on April 18, 2017
It’s now 5 WP versions behind. Apparently a vulnerability has been exposed and we are seeing a flood of registration spam. Not even captcha stops it so it must be messing interfering with anti spam measures.
If Josh Harrison updates the plugin and fixes the vulnerability, then I will check compatibility.
I have tested WP-Invites plugin and could not get a registration to go through without a valid code. Can you disable the New User Approve plugin to see if the WP-Invites plugin is still giving your problems.
@themaster5_07 Thanks for the response.
With the New User Approve plugin (and the visualCaptcha plugin) on, I tested the WP-Invites plugin, and registrations did go through without an invite code.
With the WP-Invites plugin only, registrations do not go through without an invite code.
With the WP-Invites plugin plus the visualCaptcha plugin, the registration process seems to work as it should.
Without the New User Approve plugin, I’ve changed the New User Default Role to subscriber, so if anyone comes through, they shouldn’t be able to do any damage.
I’m not sure that I really need the New User Approve plugin as this is a new site, so there may not be an urgency to worry about that.