Fix an open redirect weakness in getLoginRedirect()#796
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Backport of #795 to 3.x Because of how browsers handle the `Location` header, values beginning with `\` can be leveraged to create redirect targets on other domains. Thanks to Volker Dusch and the PHP Ecosystem security team for reporting this.
The firebase/php-jwt package contains a vulnerability that can only be resolved by going to 7.x. I didn't want to also change the requirements of this package as part of the redirect fix.
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Backport of #795 to 3.x
Because of how browsers handle the
Locationheader, values beginning with\can be leveraged to create redirect targets on other domains.Thanks to Volker Dusch and the PHP Ecosystem security team for reporting this.