This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
Post
Securely Built
securelybuilt.bsky.social
did:plc:pzhhn7k7vwe77uzvxwp4jts7
The bug is a CRLF injection in the login and session loading processes. Before authentication, cpsrvd writes a session file to disk. An attacker can manipulate the whostmgrsession cookie by omitting an expected segment.
2026-04-30T11:13:07.646Z