AnyComment < 0.3.5 - Open Redirect

The plugin has an API endpoint which passes user input via the redirect parameter to the wp_redirect() function without being validated first, leading to an Open Redirect issue, which according to the vendor, is a feature.

v < 0.3.4 - https://example.com/wp-json/anycomment/v1/auth/wordpress?redirect=https://wpscan.com

v < 0.3.5 - https://example.com/wp-json/anycomment/v1/auth/wordpress?redirect=https://wpscan.com?a=https://example.com