Provide references for CVE-2021-4252.
Where can I find more information about CVE-2021-4252?
References are available at: https://github.com/lesterchan/wp-ban/pull/11, https://github.com/lesterchan/wp-ban/commit/13e0b1e922f3aaa3f8fcb1dd6d50200dd693fd76, https://vuldb.com/?id.216209.