Updating TYPO3 4.7 to version 6.2

Question

I've updated a TYPO3 website from 4.7 to version 6.2.12. As I do so I replaced deprecated classes with the proper namespaces.

• t3lib_div to \TYPO3\CMS\Core\Utility\GeneralUtility or
• t3lib_extmgm to \TYPO3\CMS\Core\Utility\ExtensionManagementUtility

Now the old extensions are installed. But now I'm facing an error with security extension like this

Oops, an error occurred!

Invalid form/module token detected. Access Denied!

More information regarding this error might be available online.(https://wiki.typo3.org/Exception/CMS/1392409507)

And in other extension I have this error i think it is the same problem

Validating the security token of this form has failed. Please reload the form and submit it again.

I absolutely have no clue what I need to do, any suggestions?

Answer 1

You are running into the CSRF Form Protection. Please check the commit that introduced this.

Make sure to use BackendUtility::getModuleUrl() for each place you generate a link.