How severe is CVE-2017-18924?

CVE-2017-18924 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2017-18924 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-18924?

CVE-2017-18924 affects Oauth2-server Project Oauth2-server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-18924?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-18924 published?

CVE-2017-18924 was published on 2020-10-04 and last updated on 2026-06-17.

CVE-2017-18924

CVE-2017-18924 is a high-severity vulnerability in Oauth2-server Project Oauth2-server with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Oauth2-server Project Oauth2-server
Published: 2020-10-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2017-18924?: 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.
How severe is CVE-2017-18924?: CVE-2017-18924 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-18924 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-18924?: CVE-2017-18924 affects Oauth2-server Project Oauth2-server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-18924?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-18924 published?: CVE-2017-18924 was published on 2020-10-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:oauth2-server_project:oauth2-server:*:*:*:*:*:node.js:*:*

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