Improper Authorization

pretix is vulnerable to Improper Authorization. An attacker is able to exploit this vulnerability by sending a specially crafted HTTP request to a vulnerable pretix instance. This request could contain a malicious X-Forwarded-For header that spoofs the attacker’s IP address. If the pretix instance is vulnerable, it will trust the malicious X-Forwarded-For header and log the attacker’s IP address as the source of the request which could allow the attacker to hide their identity or to impersonate another user.