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https://forge.typo3.org/issues/71582
https://www.typo3.net/forum/thematik/zeige/thema/125526/
https://stackoverflow.com/questions/46406979/authenticating-remotely-validated-user-credentials-for-typo3-backend
https://maischner.de/typo3-backend-login-nicht-moeglich/
https://jweiland.net/video-anleitungen/typo3/typo3-projekte-verwalten/kein-zugriff-auf-backendfrontend.html
https://github.com/zaproxy/zaproxy/issues/3037
https://www.mittwald.de/blog/cms/typo3-cms/kein-zugang-zum-typo3-backend-und-jetzt
https://www.pagemachine.de/blog/was-tun-wenn-websites-mit-typo3-4-5-ploetzlich-den-login-ins-backend-verweigern/
https://project.math.uzh.ch/attachments/download/1617/Findings_lehrkredit_v0.4.docx
https://git.higidi.com/TYPO3/TYPO3.CMS/commit/2e58197ef08916488ffb5c8448407c6e2d0547e9?view=parallel
https://git.higidi.com/TYPO3/TYPO3.CMS/commit/9099b64c6a6a4d1d8dfee7665a51cb5203aedf9e?expanded=1&view=parallel
https://git.alexanderschnitzler.de/typo3/cms/commit/2e58197ef08916488ffb5c8448407c6e2d0547e9
https://codepen.io/pdt/pen/BYwdLZ