Vulnerability Description
LocalSend is a free, open-source app that allows users to securely share files and messages with nearby devices over their local network without needing an internet connection. Prior to version 1.17.0, due to the missing sanitization of the path in the `POST /api/localsend/v2/prepare-upload` and the `POST /api/localsend/v2/upload` endpoint, a malicious file transfer request can write files to the arbitrary location on the system, resulting in the remote command execution. A malicious file transfer request sent by nearby devices can write files into an arbitrary directory. This usually allows command execution via the startup folder on Windows or Bash-related files on Linux. If the user enables the `Quick Save` feature, it will silently write files without explicit user interaction. Version 1.17.0 fixes this issue.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Localsend | Localsend | < 1.17.0 |
Related Weaknesses (CWE)
References
- https://github.com/localsend/localsend/commit/e8635204ec782ded45bc7d698deb60f3c4Patch
- https://github.com/localsend/localsend/security/advisories/GHSA-f7jp-p6j4-3522Vendor Advisory
FAQ
What is CVE-2025-27142?
CVE-2025-27142 is a vulnerability with a CVSS score of 8.8 (HIGH). LocalSend is a free, open-source app that allows users to securely share files and messages with nearby devices over their local network without needing an internet connection. Prior to version 1.17.0...
How severe is CVE-2025-27142?
CVE-2025-27142 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-27142?
Check the references section above for vendor advisories and patch information. Affected products include: Localsend Localsend.