Possible code injection vulnerability in Rails / Active Storage

There is a possible code injection vulnerability in the Active Storage module
of Rails. This vulnerability has been assigned the CVE identifier
CVE-2022-21831.

Versions Affected: >= 5.2.0
Not affected: < 5.2.0
Fixed Versions: 7.0.2.3, 6.1.4.7, 6.0.4.7, 5.2.6.3

Impact

There is a possible code injection vulnerability in the Active Storage module
of Rails. This vulnerability impacts applications that use Active Storage
with the image_processing processing in addition to the mini_magick back end
for image_processing.

Vulnerable code will look something similar to this:

<%= image_tag blob.variant(params[:t] => params[:v]) %>

Where the transformation method or its arguments are untrusted arbitrary
input.

All users running an affected release should either upgrade or use one of the
workarounds immediately.

Workarounds

To work around this issue, applications should implement a strict allow-list
on accepted transformation methods or arguments. Additionally, a strict image
magick security policy will help mitigate this issue.

https://imagemagick.org/script/security-policy.php