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Fencer Vulns
medium 4.3

CVE-2022-21696 json

Username spoofing in OnionShare

published 2022-01-18 4 y ago modified 2026-06-17 4 mo ago also GHSA-68vr-8f46-vc9f , PYSEC-2022-47 , EUVD-2022-0187

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits
0
none known

Summary

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.

Patch / fix

  • pypi onionshare-cli 2.5
  • onionshare onionshare 2.5
  • onionshare Debian 14, Debian 13, Debian 12 2.5-1

debian advisories DEBIAN-CVE-2022-21696

  • python-onionshare openSUSE Tumbleweed 2.5-1.1
  • python3-onionshare openSUSE Tumbleweed 2.6-4.1

opensuse advisories openSUSE-SU-2024:11983-1openSUSE-SU-2024:13635-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-21696 updated cvss 4.3

onionshare: improper input validation

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:P/A:N
GitHub 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi onionshare-cli
>=2.3, <2.5
<2.5
2.5

Affected products

  • onionshare onionshare

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.