TYPO3 Core

See for a hotfix: https://review.typo3.org/#/c/18755/

Patch set 3 for branch master has been pushed to the review server.
It is available at https://review.typo3.org/18753

Patch set 4 for branch master has been pushed to the review server.
It is available at https://review.typo3.org/18753

Reproduce:
create a page 'external url', call frontend that renders this page link in a frontend menu, click it -> boom.

Patch set 1 for branch TYPO3_6-0 has been pushed to the review server.
It is available at https://review.typo3.org/18765

Patch set 2 for branch TYPO3_4-5 has been pushed to the review server.
It is available at https://review.typo3.org/18755

Patch set 1 for branch TYPO3_4-6 has been pushed to the review server.
It is available at https://review.typo3.org/18766

Patch set 1 for branch TYPO3_4-7 has been pushed to the review server.
It is available at https://review.typo3.org/18767

Sorry but this patch doesn't work in my TYPO3 4.7.9 installation.
By instance, site http://www.gamelli.it/ has an external link "Pro" (top right of nav) to http://pro.gamelli.it
this link throws a:

Uncaught TYPO3 Exception
#1359987599: jumpurl: Calculated juHash did not match the submitted juHash. (More information)
Exception thrown in file
***/typo3/sysext/cms/tslib/class.tslib_fe.php in line 2699.

What could I try to fix this?

We tested the fix in 4.5.24 and it works.

I fixed the problem described in #11 removing:
TSFE.jumpUrl_transferSession = 1

Same here, the extension cbstarter contained TSFE.jumpUrl_transferSession = 1. Removing that line made the error disappear.

Thanks ian !