Update the WordPress My Calendar plugin to the latest available version (at least 3.3.17).
Dan Kegel discovered and reported this Open Redirection vulnerability in WordPress My Calendar Plugin. This could allow a malicious actor to redirect users from one site to the other due to the redirect URL not being validated. Users could be tricked to visiting a legitimate site to then be redirected to a malicious site and cause a phishing incident. This vulnerability has been fixed in version 3.3.17.
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