ash_paper_trail vulnerabilities

The ash_paper_trail library (ash-project) has a cleartext storage of sensitive information vulnerability. An attacker with read access to the generated version resource can recover sensitive values nested inside embedded resources, unions, or lists. The sensitive_attributes :redact and :ignore only act on top-level attributes, not descending into nested structures.

The ash_paper_trail library (ash-project) has an inefficient algorithmic complexity vulnerability. A user who can submit a large array attribute to a paper-trailed create or update action can cause a denial of service through excessive CPU and memory use. This results from cubic scaling of list comparison operations in full-diff mode.

The ash_paper_trail library (ash-project) has a cleartext storage of sensitive information vulnerability. An attacker with read access to the generated version resource can recover the plaintext of sensitive? attributes. These values are stored in the changes map, which is public and not marked as sensitive, so they are returned by the default read action and printed in logs and error messages.