Pimcore is an Open Source Data & Experience Management Platform. Any call with the query argument `?pimcore_preview=true` allows to view unpublished sites. In previous versions of Pimcore, session information would propagate to previews, so only a logged in user could open a preview. This no longer applies. Previews are broad open to any user and with just the hint of a restricted link one could gain access to possible confident / unreleased information. This vulnerability is fixed in 11.2.2 and 11.1.6.1.
https://github.com/pimcore/pimcore/security/advisories/GHSA-5737-rqv4-v445
https://github.com/pimcore/pimcore/commit/3ae43fb1065f9eb62ad2f542b883858d36d57e53