CVE-2022-21689

Name: CVE-2022-21689
Creator: NVD / NIST
Published: 2022-01-18T22:15:07.987+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.37%

Last modified Jun 17, 2026

CVE-2022-21689 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. In affected versions the receive mode limits concurrent uploads to 100 per second and blocks other uploads in the same second, which can be triggered by a simple script. EPSS estimates a 1.37% chance of exploitation in the next 30 days.

Description

OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. In affected versions the receive mode limits concurrent uploads to 100 per second and blocks other uploads in the same second, which can be triggered by a simple script. An adversary with access to the receive mode can block file upload for others. There is no way to block this attack in public mode due to the anonymity properties of the tor network.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.37%

68.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Onionshare	Onionshare	< 2.5

References

https://github.com/onionshare/onionshare/releases/tag/v2.5Release Notes, Third Party Advisory
https://github.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpcThird Party Advisory
https://github.com/onionshare/onionshare/releases/tag/v2.5Release Notes, Third Party Advisory
https://github.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpcThird Party Advisory

Timeline

Published: Jan 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21689?

How severe is CVE-2022-21689?

CVE-2022-21689 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.37% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21689?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-21689?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST