CVE-2017-18924

Name: CVE-2017-18924
Creator: NVD / NIST
Published: 2020-10-04T05:15:12.14+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.16%

Last modified Jun 17, 2026

CVE-2017-18924 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. oauth2-server (aka node-oauth2-server) through 3.1.1 implements OAuth 2.0 without PKCE. It does not prevent authorization code injection. EPSS estimates a 2.16% chance of exploitation in the next 30 days.

Description

oauth2-server (aka node-oauth2-server) through 3.1.1 implements OAuth 2.0 without PKCE. It does not prevent authorization code injection. This is similar to CVE-2020-7692. NOTE: the vendor states 'As RFC7636 is an extension, I think the claim in the Readme of "RFC 6749 compliant" is valid and not misleading and I also therefore wouldn't describe this as a "vulnerability" with the library per se.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.16%

79.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Oauth2-Server Project	Oauth2-Server	<= 3.1.1

References

https://codeburst.io/missing-the-point-in-securing-oauth-2-0-83968708b467Third Party Advisory
https://github.com/oauthjs/node-oauth2-server/issues/637Exploit, Third Party Advisory
https://github.com/oauthjs/node-oauth2-server/pull/452Patch, Third Party Advisory
https://tools.ietf.org/html/draft-ietf-oauth-security-topics-15Exploit, Third Party Advisory
https://tools.ietf.org/html/rfc7636Third Party Advisory
https://codeburst.io/missing-the-point-in-securing-oauth-2-0-83968708b467Third Party Advisory
https://github.com/oauthjs/node-oauth2-server/issues/637Exploit, Third Party Advisory
https://github.com/oauthjs/node-oauth2-server/pull/452Patch, Third Party Advisory
https://tools.ietf.org/html/draft-ietf-oauth-security-topics-15Exploit, Third Party Advisory
https://tools.ietf.org/html/rfc7636Third Party Advisory

Timeline

Published: Oct 4, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-18924?

How severe is CVE-2017-18924?

CVE-2017-18924 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.16% probability of exploitation in the next 30 days.

How do I fix CVE-2017-18924?

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-2017-18924?

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

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Source: NVD / NIST