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CVE-2020-8823

21
FAUCET Score

CVE-2020-8823 describes a Reflected Cross-Site Scripting (XSS) vulnerability in SockJS versions prior to 0.3.0, specifically within the htmlfile component. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low attack complexity, requiring user interaction, and could lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.3.0CPE matchmatch criteria
cpe:2.3:a:sockjs_project:sockjs:*:*:*:*:*:node.js:*:*

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
1.89%
Probability of exploitation in next 30 days
EPSS Percentile
77.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0189 is in the 89th percentile among its peer group of 26,219 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: sockjsFixed in: 0.3.0

Vendor Advisories (2)

npmGHSA-hh8v-jmh3-9437medium

Cross-site scripting in SocksJS-node

Apr 13, 2021
redhatCVE-2020-8823Moderate

sockJS: function htmlfile is not checking the non-alphanumeric symbols which could result in reflected XSS

Feb 8, 2020

References

github.com / theyiyibest/Reflected-XSS-on-SockJS
ExploitPatchThird Party Advisory
github.com / theyiyibest/Reflected-XSS-on-SockJS/issues/1
Third Party Advisory
snyk.io / vuln/SNYK-JS-SOCKJS-548397
Third Party Advisory
sockjs.org
Vendor Advisory