Postbird 0.8.4 allows stored XSS via the onerror attribute of an IMG element in any PostgreSQL database table. This can result in reading local files via vectors involving XMLHttpRequest and open of a file:/// URL, or discovering PostgreSQL passwords via vectors involving Window.localStorage and savedConnections.
packetstormsecurity.com/files/162831/Postbird-0.8.4-Cross-Site-Scripting-Local-File-Inclusion.html
packetstormsecurity.com/files/162872/Postbird-0.8.4-XSS-LFI-Insecure-Data-Storage.html
github.com/Paxa/postbird/issues/132
github.com/Paxa/postbird/issues/133
github.com/Paxa/postbird/issues/134
github.com/Tridentsec-io/postbird
tridentsec.io/blogs/postbird-cve-2021-33570/
www.exploit-db.com/exploits/49910