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CVE-2021-32631

22
FAUCET Score

CVE-2021-32631 describes an authentication bypass vulnerability in the "Common" package of NIMBLE services, affecting versions prior to commit 3b96cb0293d3443b87035145f41d7d55cb34b53. This flaw stems from improper JSON Web Token (JWT) signature verification, allowing attackers to forge valid JWTs. Rated as Medium severity (CVSS 6.5), it presents a low-complexity network attack that could lead to high integrity impact, potentially bypassing authentication mechanisms. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:nimble-project:common:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.09%
Probability of exploitation in next 30 days
EPSS Percentile
61.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0109 is in the 75th percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / nimble-platform/common/commit/12197a755bd524559bf4e16475595a2c6fcd34db
PatchThird Party Advisory
github.com / nimble-platform/common/commit/3b96cb0293d3443b870351945f41d7d55cb34b53
PatchThird Party Advisory
github.com / nimble-platform/common/commit/a59ad46733912a5580530e39cac0e6ebc83cc563
PatchThird Party Advisory
github.com / nimble-platform/common/security/advisories/GHSA-fjq8-896w-pv28
Third Party Advisory