CVE-2021-32631: Common is a package of common modules that can be accessed by NIMBLE services

Routine

MEDIUM 6.5MITIGATE

CVE-2021-32631 is a medium-severity flaw (CVSS 6.5) affecting common. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 metho

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-290
Published	2021-07-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: nimble-project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-07-26 16:15 UTCPublished CVE record published
2026-06-17 03:53 UTCUpdated Record last modified

nimble-project common MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy common || rpm -q common || common --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-32631?

common: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-32631 being exploited?

CVE-2021-32631 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-32631 affect?

CVE-2021-32631 affects common. Severity is medium (CVSS 6.5). 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 val

How urgent is CVE-2021-32631?

Priority 39/100. No elevated risk signals yet.

Related CVEs

CVE-2024-9341 MEDIUM 5.4 MITIGATE DOWNGRADE A flaw was found in Go
CVE-2024-39003 HIGH 7.3 DOWNGRADE amoyjs amoy common v1.0.10 was discovered to contain a prototype pollution via the function setValue
CVE-2024-38994 HIGH 7.3 DOWNGRADE amoyjs amoy common v1.0.10 was discovered to contain a prototype pollution via the function extend
CVE-2018-14065 CRITICAL 9.8 UPGRADE XMLReader.php in PHPOffice Common before 0.2.9 allows XXE.

References

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