An SSRF issue was discovered in Zammad before 3.4.1. The SMS configuration interface for Massenversand is implemented in a way that renders the result of a test request to the User. An attacker can use this to request any URL via a GET request from the network interface of the server. This may lead to disclosure of information from intranet systems.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26032
Reference (s):
- https://zammad.com/news/security-advisory-zaa-2020-15