Impact

We fixed with CVE-2023-22731 Twig filters to only be executed with allowed functions. It is possible to pass PHP Closures as string or an array and array crafted PHP Closures was not checked against allow list

Patches

The problem has been fixed with 6.4.20.1 with an improved override.

Workarounds

For older versions of 6.1, 6.2, and 6.3, corresponding security measures are also available via a plugin. For the full range of functions, we recommend updating to the latest Shopware version.

References

https://docs.shopware.com/en/shopware-6-en/security-updates/security-update-04-2023?category=security-updates