An issue was discovered in RouterNanoHTTPD.java in NanoHTTPD through 2.3.1.
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.
Summary
An issue was discovered in RouterNanoHTTPD.java in NanoHTTPD through 2.3.1. The GeneralHandler class implements a basic GET handler that prints debug information as an HTML page. Any web server that extends this class without implementing its own GET handler is vulnerable to reflected XSS, because the GeneralHandler GET handler prints user input passed through the query string without any sanitization.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | org.nanohttpd:nanohttpd-nanolets (Maven) | up to 2.3.1 | — | No fix listed | GHSA-pr5m-4w22-8483 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- org.nanohttpd:nanohttpd-nanolets (Maven) Vendor— Affected up to 2.3.1 Fixed in — No fix listed GHSA-pr5m-4w22-8483
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-13697
- 2026-10-03 Alias added: GHSA-pr5m-4w22-8483
References
Advisory 3
Other 3
More Nanohttpd vulnerabilities
- TI-2022-05622 Information exposure in org.nanohttpd:nanohttpd CVSS 3.1MEDIUM 5.5
Sources
- CVE-2020-13697 · CVE Program
- CVE-2020-13697 · NVD
- FIRST EPSS
- GHSA-pr5m-4w22-8483 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences