The versions indicated there is versions less than 5.153.4 and the current plugin version is 5.157.1 so the notice is outdated.
Hello, @philesq
We’ve already fixed this injection on March 10, 2021:
https://blog.cleantalk.org/sql-injection-in-anti-spam-by-cleantalk-for-wordpress-prior-5-153-4/
As @danielbair said, you should use any version above 5.153.4.
The manual to update the plugin is here:
https://cleantalk.org/help/update-wordpress
Thank you.
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This reply was modified 5 years, 1 month ago by
amagsumov.
We haven’t heard back from you in a while, so I’m going to mark this as resolved – if you have any further questions, you can start a new thread.