The WordPress Newsletter Plugin WordPress plugin before 1.6.5 does not validate the to parameter before redirecting the user to its given value, leading to an open redirect issue
CWE-601
CVE-2021-24838
The AnyComment WordPress plugin before 0.3.5 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.
CVE-2021-24406
The wpForo Forum WordPress plugin before 1.9.7 did not validate the redirect_to parameter in the login form of the forum, leading to an open redirect issue after a successful login. Such issue could allow an attacker to induce a user to use a login URL redirecting to a website under their control and being a replica of the legitimate one, asking them to re-enter their credentials (which will then in the attacker hands)
CVE-2021-24358
The Plus Addons for Elementor Page Builder WordPress plugin before 4.1.10 did not validate a redirect parameter on a specifically crafted URL before redirecting the user to it, leading to an Open Redirect issue.
CVE-2021-24288
When subscribing using AcyMailing, the ‘redirect’ parameter isn’t properly sanitized. Turning the request from POST to GET, an attacker can craft a link containing a potentially malicious landing page and send it to the victim.
CVE-2021-24210
There is an open redirect in the PhastPress WordPress plugin before 1.111 that allows an attacker to malform a request to a page with the plugin and then redirect the victim to a malicious page. There is also a support comment from another user one year ago (https://wordpress.org/support/topic/phast-php-used-for-remote-fetch/) that says that the php involved in the request only go to whitelisted pages but it’s possible to redirect the victim to any domain.