HOMEVULNERABILITIESCVE-2022-21689
HIGH

CVE-2022-21689

CWE-400Published: January 18, 2022· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2022-21689 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

onionshare1 product(s)
onionshare
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/onionshare/onionshare/releases/tag/v2.5
ADVISORYhttps://github.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpc
ADVISORYhttps://github.com/onionshare/onionshare/releases/tag/v2.5
ADVISORYhttps://github.com/onionshare/onionshare/security/advisories/GHSA-jh82-c5jw-pxpc

All References (4)

→
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

Quick Facts

CVE IDCVE-2022-21689
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-400
CISA KEVNo
Affected1 vendor(s)
PublishedJan 18, 2022

Related CVEs (CWE-400)

CVE-2025-24260
9.8
CVE-2025-24190
9.8
CVE-2025-24269
9.8
CVE-2024-45166
9.8
CVE-2025-24211
9.8
CVE-2018-19282
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-21689 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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