A flaw was found in ImageMagick in versions before 7.0.11. A potential cipher leak when the calculate signatures in TransformSignature is possible. The highest threat from this vulnerability is to data confidentiality.
https://lists.debian.org/debian-lts-announce/2023/05/msg00020.html
https://lists.debian.org/debian-lts-announce/2021/06/msg00000.html