An incorrect access control implementation in Tangro Business Workflow before 1.18.1 allows an attacker to download documents (PDF) by providing a valid document ID and token. No further authentication is required.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26173
Reference (s):
- https://blog.to.com/advisory-tangro-bwf-1-17-5-multiple-vulnerabilities/
- https://www.tangro.de/