The PS PHPCaptcha WP plugin before v1.2.0 for WordPress mishandles sanitization of input values.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-7412
Reference (s):
- https://metamorfosec.com/Files/Advisories/METS-2019-003-Denial_of_Service_in_PS_PHPCaptcha_WP_before_v1.2.0.txt
- https://wordpress.org/plugins/ps-phpcaptcha/#developers