CVE-2020-28481

Name: CVE-2020-28481
Creator: NVD / NIST
Published: 2021-01-19T15:15:12.06+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2020-28481 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.73%

49.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-346

Affected Software

Vendor	Product	Versions
Socket	Socket.Io	< 2.4.0

References

https://github.com/socketio/socket.io/issues/3671Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1056358Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1056357Third Party Advisory
https://snyk.io/vuln/SNYK-JS-SOCKETIO-1024859Third Party Advisory
https://github.com/socketio/socket.io/issues/3671Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1056358Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1056357Third Party Advisory
https://snyk.io/vuln/SNYK-JS-SOCKETIO-1024859Third Party Advisory

Timeline

Published: Jan 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28481?

The package socket.io before 2.4.0 are vulnerable to Insecure Defaults due to CORS Misconfiguration. All domains are whitelisted by default.

How severe is CVE-2020-28481?

CVE-2020-28481 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28481?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-28481?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST