Vulnerability Description
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, it can be used to replace the file without changing the file name and details or the name of the user who uploaded the file. During the upload, file interception and allowed file type rules are still applied correctly.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2025-3519?
CVE-2025-3519 is a documented vulnerability. 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 U...
How severe is CVE-2025-3519?
CVSS scoring is not yet available for CVE-2025-3519. Check NVD for updates.
Is there a patch for CVE-2025-3519?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.