CVE-2021-41580

Name: CVE-2021-41580
Creator: NVD / NIST
Published: 2021-09-27T07:15:06.803+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.26%

Last modified Jun 17, 2026

CVE-2021-41580 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. The passport-oauth2 package before 1.6.1 for Node.js mishandles the error condition of failure to obtain an access token. This is exploitable in certain use cases where an OAuth identity provider uses an HTTP 200 status code for authentication-failure error reports, and an application grants authorization upon simply receiving the access token (i.e., does not try to use the token). EPSS estimates a 1.26% chance of exploitation in the next 30 days.

Description

The passport-oauth2 package before 1.6.1 for Node.js mishandles the error condition of failure to obtain an access token. This is exploitable in certain use cases where an OAuth identity provider uses an HTTP 200 status code for authentication-failure error reports, and an application grants authorization upon simply receiving the access token (i.e., does not try to use the token). NOTE: the passport-oauth2 vendor does not consider this a passport-oauth2 vulnerability

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.26%

65.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Passportjs	Passport-Oauth2	< 1.6.1

References

https://github.com/jaredhanson/passport-oauth2/commit/8e3bcdff145a2219033bd782fc517229fe3e05eaPatch, Third Party Advisory
https://github.com/jaredhanson/passport-oauth2/compare/v1.6.0...v1.6.1Patch, Third Party Advisory
https://github.com/jaredhanson/passport-oauth2/pull/144Patch, Third Party Advisory
https://github.com/jaredhanson/passport-oauth2/commit/8e3bcdff145a2219033bd782fc517229fe3e05eaPatch, Third Party Advisory
https://github.com/jaredhanson/passport-oauth2/compare/v1.6.0...v1.6.1Patch, Third Party Advisory
https://github.com/jaredhanson/passport-oauth2/pull/144Patch, Third Party Advisory

Timeline

Published: Sep 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41580?

How severe is CVE-2021-41580?

CVE-2021-41580 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.26% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41580?

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-2021-41580?

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

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Source: NVD / NIST