What’s Vulnerable › Vulnerabilities

CVE-2021-41868

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-04 · updated 2026-06-17

Description

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: from 2.3 before 2.4 — fixed in 2.4

How to fix

Upgrade to a fixed version: onionshare 2.4. Check the vendor advisory for mitigations.

References

• https://github.com/onionshare/onionshare/compare/v2.3.3...v2.4
• https://www.ihteam.net/advisory/onionshare/
• https://github.com/onionshare/onionshare/compare/v2.3.3...v2.4
• https://www.ihteam.net/advisory/onionshare/

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