An uninitialized memory buffer leak exists in Fortinet FortiOS 5.6.1 to 5.6.3, 5.4.6 to 5.4.7, 5.2 all versions under web proxy's disclaimer response web pages, potentially causing sensitive data to be displayed in the HTTP response.
https://herolab.usd.de/wp-content/uploads/sites/4/2018/12/usd20180031.txt