Cross-Site Scripting in Onionshare
Priority HIGH 73CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
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 The path parameter of the requested URL is not sanitized before being passed to the QT frontend. This path is used in all components for displaying the server access history. This leads to a rendered HTML4 Subset (QT RichText editor) in the Onionshare frontend.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00795 56th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed onionshare (onionshare): 2.5onionshare-cli (PyPI): 2.5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| onionshare | onionshare | before 2.5 | 2.5 | Patch available | CNA |
| — | onionshare-cli (PyPI) | before 2.5 | 2.5 | Patch available | GHSA-ch22-x2v3-v6vq |
- onionshare Vendoronionshare Affected before 2.5 Fixed in 2.5 Patch available CNA
- onionshare-cli (PyPI) Vendor— Affected before 2.5 Fixed in 2.5 Patch available GHSA-ch22-x2v3-v6vq
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:onionshare:onionshare:*:*:*:*:*:*:*:* | before 2.5 | Vulnerable | onionshare |
- cpe:2.3:a:onionshare:onionshare:*:*:*:*:*:*:*:* Versions before 2.5 Vulnerable ·onionshare
Remediation
- Fix · CNA onionshare (onionshare) Fixed in 2.5
- Fix · GHSA-ch22-x2v3-v6vq onionshare-cli (PyPI) Fixed in 2.5 Advisory →
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2022-21690
- 2026-10-03 Alias added: GHSA-ch22-x2v3-v6vq
References
Advisory 2
More Onionshare vulnerabilities
- TI-2022-06068 Improper Access Control in Onionshare CVSS 3.1MEDIUM 4.3
- TI-2021-18479 OnionShare 2.3 before 2.4 allows remote unauthenticated attackers to upload files on a… CVSS 3.1CRITICAL 9.8
- TI-2022-06065 Denial of Service in Onionshare CVSS 3.1HIGH 7.5
- TI-2022-06064 Out-of-bounds Read in Onionshare CVSS 3.1HIGH 7.5
- TI-2022-06069 Path traversal in Onionshare CVSS 3.1MEDIUM 6.5
- TI-2018-14146 The debug_mode function in web/web.py in OnionShare through 1.3.1, when --debug is… CVSS 3.0HIGH 7.0
Sources
- CVE-2022-21690 · CVE Program
- CVE-2022-21690 · NVD
- FIRST EPSS
- GHSA-ch22-x2v3-v6vq · GitHub Advisory Database · CC BY 4.0
- CVE-2022-21690 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences