Zitat von MITs Forum am 21. November 2023, 0:00 Uhr

An issue was discovered in ownCloud owncloud/oauth2 before 0.6.1, when Allow Subdomains is enabled. An attacker is able to pass in a crafted redirect-url that bypasses validation, and consequently allows an attacker to redirect callbacks to a Top Level Domain controlled by the attacker.

References
https://owncloud.com/security-advisories/subdomain-validation-bypass/
https://owncloud.org/security