A stored cross-site scripting (XSS) vulnerability was discovered in Seafile Community Edition prior to version 13.0.12. When Seafile is configured with the Golang file server, an attacker can upload a crafted SVG file containing malicious JavaScript and share it using a public link. Opening the link triggers script execution in the victim's browser. This issue has been fixed in Seafile Community Edition 13.0.12.
https://manual.seafile.com/latest/changelog/server-changelog/
https://gist.github.com/x0root/e5597622fede55b320d29a248dce01e6