How severe is CVE-2022-21696?

CVE-2022-21696 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2022-21696 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-21696?

CVE-2022-21696 affects Onionshare. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-21696?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-21696 published?

CVE-2022-21696 was published on 2022-01-18 and last updated on 2026-06-17.

CVE-2022-21696

CVE-2022-21696 is a medium-severity vulnerability in Onionshare with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Onionshare
Published: 2022-01-18
Last modified: 2026-06-17

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 it is possible to change the username to that of another chat participant with an additional space character at the end of the name string. An adversary with access to the chat environment can use the rename feature to impersonate other participants by adding whitespace characters at the end of the username.

Frequently asked questions

What is CVE-2022-21696?: 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 it is possible to change the username to that of another chat participant with an additional space character at the end of the name string. An adversary with access to the chat environment can use the rename feature to impersonate other participants by adding whitespace characters at the end of the username.
How severe is CVE-2022-21696?: CVE-2022-21696 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2022-21696 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-21696?: CVE-2022-21696 affects Onionshare. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-21696?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-21696 published?: CVE-2022-21696 was published on 2022-01-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:onionshare:onionshare:*:*:*:*:*:*:*:*

More vulnerabilities in Onionshare

CVE-2021-41868 — Critical (CVSS 9.8): OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to upload files on a non-public node when using the…
CVE-2022-21690 — High (CVSS 8.7): OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with…
CVE-2022-21689 — High (CVSS 7.5): OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with…
CVE-2022-21688 — High (CVSS 7.5): OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with…
CVE-2018-19960 — High (CVSS 7.0): The debug_mode function in web/web.py in OnionShare through 1.3.1, when --debug is enabled, uses the…
CVE-2022-21693 — Medium (CVSS 6.3): OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with…

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