CVE-2021-41868

CRITICALNVD 9.89.8—

9.8

OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to upload files on a non-public node when using the --receive functionality.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 72.6%
KEV: Not listed

Published

October 4, 2021

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://github.com/onionshare/onionshare/compare/v2.3.3...v2.4
cve@mitrehttps://www.ihteam.net/advisory/onionshare/
af854a3a-2127-422b-91ae-364da2661108https://github.com/onionshare/onionshare/compare/v2.3.3...v2.4
af854a3a-2127-422b-91ae-364da2661108https://www.ihteam.net/advisory/onionshare/

Affected Packages

(1 across 1 ecosystem)

PyPI(1)

Package	Vulnerable range	Fixed in	Dependents
onionshare-cli	2.3, 2.3.1, 2.3.2, 2.3.3	2.4	—

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 09:34 UTCEG score recompute
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-41868?

CVE-2021-41868 is a critical vulnerability published on October 4, 2021. OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to upload files on a non-public node when using the --receive functionality.

When was CVE-2021-41868 disclosed?

CVE-2021-41868 was first published in the National Vulnerability Database on October 4, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-41868 actively exploited?

CVE-2021-41868 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 72.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-41868?

CVE-2021-41868 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-41868?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-41868, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-41868

📅 Published

🔄 Last Modified

🔗 References (4)