CVE-2021-41868: Onionshare

Critical severity, CVSS 9.8. EPSS: 2.4% chance of exploitation in the next 30 days.

OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to upload files on a non-public node when using the --receive functionality.

Affected products

• Onionshare Onionshare: from 2.3, before 2.4 (fixed in 2.4)

Published 2021-10-04. Last modified 2026-06-17.