TYPO3 Exception 1588095935¶

Note

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TYPO3\CMS\Core\Http\Security\MissingReferrerException¶

#1588095935 TYPO3\CMS\Core\Http\Security\MissingReferrerException
Missing referrer for /main

This error occurs when logging into the backend or Install Tool and is triggered by a failed check of the Referer header.

The reason for this may be: the use of an HTTP proxy, e.g. a reverse proxy to an encapsulated system without sufficient header delegation the webserver is not configured correctly to use a valid certificate

Solution¶

Check whether the HTTPS proxy is configured correctly.
Check whether the values for the variables are correct: :code:`$GLOBALS['TYPO3_CONF_VARS']['SYS']['reverseProxySSL']` $GLOBALS['TYPO3_CONF_VARS']['SYS']['reverseProxyIP'] * $GLOBALS['TYPO3_CONF_VARS']['SYS']['trustedHostsPattern']
Check whether the HTTPS connection is secured by a valid certificate.

The security check for the correct referrer was introduced due to potential security risks, visit the related security advisory for more information.

It is recommended that you keep this feature enabled, but it can be enabled or disabled in Admin Tools > Settings > Configure Installation-Wide Options > System > [SYS][features][security.backend.enforceReferrer].