CVE-2025-3519

An authorization bypass in Unblu Spark allows a participant of a conversation to replace an existing, uploaded file. Every uploaded file in Unblu gets assigned with a randomly generated Universally Unique ID UUID. In case a participant of this or another conversation gets access to such a file ID...

CVE-2025-3519

An authorization bypass in Unblu Spark allows a participant of a conversation to replace an existing, uploaded file. Every uploaded file in Unblu gets assigned with a randomly generated Universally Unique ID UUID. In case a participant of this or another conversation gets access to such a file ID...

CVE-2025-3519 Replace uploaded files knowing the file upload ID

An authorization bypass in Unblu Spark allows a participant of a conversation to replace an existing, uploaded file. Every uploaded file in Unblu gets assigned with a randomly generated Universally Unique ID UUID. In case a participant of this or another conversation gets access to such a file ID...

CVE-2025-3519

Summary: CVE-2025-3519 is an authorization bypass in Unblu Spark that allows a conversation participant to replace an existing uploaded file by using the file’s UUID. The issue affects Unblu Spark versions 8.0.0–8.12.1 and 8.13.1, enabling file replacement without altering the file name, uploader...