Error in version: 12.1 and less
Severity: high
To fix this issue, open the file engine/classes/parse.class.php and find:
function clear_url($url) {
global $config;
below add:
$url = str_replace(array("{", "}", "[", "]"),array("%7B", "%7D", "%5B", "%5D"), $url);
This fix is for version 12.1 and all versions less that 12.1.
The version 12.1 on our server updated.