CVE-2019-12581
A reflective Cross-site scripting (XSS) vulnerability in the free_time_failed.cgi CGI program in selected Zyxel ZyWall, USG, and UAG devices allows remote attackers to inject arbitrary web script or HTML via the err_msg parameter.
Date published : 2019-06-27
https://www.zyxel.com/support/vulnerabilities-related-to-the-Free-Time-feature.shtml
https://n-thumann.de/blog/zyxel-gateways-missing-access-control-in-account-generator-xss/