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.
The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.
Link | Tags |
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https://wpscan.com/vulnerability/9b3c5412-8699-49e8-b60c-20d2085857fb | third party advisory exploit |
https://plugins.trac.wordpress.org/changeset/2497610/ | third party advisory patch |