CVE-2021-32631

Name: CVE-2021-32631
Creator: NVD / NIST
Published: 2021-07-26T16:15:07.637+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.09%

Last modified Jun 17, 2026

CVE-2021-32631 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Common is a package of common modules that can be accessed by NIMBLE services. Common before commit number 3b96cb0293d3443b870351945f41d7d55cb34b53 did not properly verify the signature of JSON Web Tokens. EPSS estimates a 1.09% chance of exploitation in the next 30 days.

Description

Common is a package of common modules that can be accessed by NIMBLE services. Common before commit number 3b96cb0293d3443b870351945f41d7d55cb34b53 did not properly verify the signature of JSON Web Tokens. This allows someone to forge a valid JWT. Being able to forge JWTs may lead to authentication bypasses. Commit number 3b96cb0293d3443b870351945f41d7d55cb34b53 contains a patch for the issue. As a workaround, one may use the parseClaimsJws method to correctly verify the signature of a JWT.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.09%

61.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nimble-Project	Common	All versions

References

https://github.com/nimble-platform/common/commit/12197a755bd524559bf4e16475595a2c6fcd34dbPatch, Third Party Advisory
https://github.com/nimble-platform/common/commit/3b96cb0293d3443b870351945f41d7d55cb34b53Patch, Third Party Advisory
https://github.com/nimble-platform/common/commit/a59ad46733912a5580530e39cac0e6ebc83cc563Patch, Third Party Advisory
https://github.com/nimble-platform/common/security/advisories/GHSA-fjq8-896w-pv28Third Party Advisory
https://github.com/nimble-platform/common/commit/12197a755bd524559bf4e16475595a2c6fcd34dbPatch, Third Party Advisory
https://github.com/nimble-platform/common/commit/3b96cb0293d3443b870351945f41d7d55cb34b53Patch, Third Party Advisory
https://github.com/nimble-platform/common/commit/a59ad46733912a5580530e39cac0e6ebc83cc563Patch, Third Party Advisory
https://github.com/nimble-platform/common/security/advisories/GHSA-fjq8-896w-pv28Third Party Advisory

Timeline

Published: Jul 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32631?

How severe is CVE-2021-32631?

CVE-2021-32631 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.09% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32631?

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-2021-32631?

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

Scan your code now

Source: NVD / NIST