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CVE-2020-13697

17
FAUCET Score

CVE-2020-13697 describes a reflected Cross-Site Scripting (XSS) vulnerability in NanoHTTPD versions up to 2.3.1, specifically within the RouterNanoHTTPD.java's GeneralHandler class. This flaw occurs when web servers extending GeneralHandler fail to implement their own GET handler, leading to unsanitized user input from query strings being reflected in debug information. The vulnerability carries a CVSS v3.1 score of 6.1 (Medium), indicating it can be exploited remotely with low attack complexity, requiring user interaction, and potentially leading to low impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.3.1CPE matchmatch criteria
cpe:2.3:a:nanohttpd:nanohttpd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.75%
Probability of exploitation in next 30 days
EPSS Percentile
51.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0075 is in the 58th percentile among its peer group of 26,220 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

mavenGHSA-pr5m-4w22-8483medium

NanoHTTPD Cross-site Scripting vulnerability

Feb 25, 2021

References

github.com / NanoHttpd/nanohttpd
ProductThird Party Advisory
vdoo.com / advisories
Third Party Advisory