A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a slash and backslash at the beginning.
lists.opensuse.org/opensuse-security-announce/2020-03/msg00036.html
github.com/zmartzone/mod_auth_openidc/commit/02431c0adfa30f478cf2eb20ed6ea51fdf446be7
github.com/zmartzone/mod_auth_openidc/pull/453
lists.debian.org/debian-lts-announce/2020/02/msg00035.html
lists.debian.org/debian-lts-announce/2020/07/msg00028.html
lists.debian.org/debian-lts-announce/2023/04/msg00034.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/27XJYAEONKJDESNE7WVZF5D2Z2OBY5JK/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGXONXPWTX7DV62TIUIUVOZF4KQ6SIJE/