CVE-2020-10254
An issue was discovered in ownCloud before 10.4. An attacker can bypass authentication on a password-protected image by displaying its preview.
Date published : 2021-02-19
https://owncloud.com/security-advisories/public-link-password-bypass-via-image-previews/
https://blog.hacktivesecurity.com/index.php?controller=post&action=view&id_post=44