NATS Server/JWT Library Import Token access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in NATS Server and JWT Library and classified as critical. Affected is an unknown function of the component Import Token Handler. The manipulation leads to access control. This vulnerability is referenced as CVE-2021-3127. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in NATS Server and JWT Library (Software Library) (the affected version unknown). This issue affects an unknown part of the component Import Token Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability.

The weakness was published 03/17/2021. It is possible to read the advisory at advisories.nats.io. The identification of this vulnerability is CVE-2021-3127. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 257974 (Linux Distros Unpatched Vulnerability : CVE-2021-3127), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (257974). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 257974
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-3127

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/12/2021 🔍
03/17/2021 +64 days 🔍
03/17/2021 +0 days 🔍
03/30/2026 +1839 days 🔍

Sourcesinfo

Advisory: advisories.nats.io
Status: Confirmed

CVE: CVE-2021-3127 (🔍)
GCVE (CVE): GCVE-0-2021-3127
GCVE (VulDB): GCVE-100-171335

Entryinfo

Created: 03/17/2021 09:48
Updated: 03/30/2026 16:36
Changes: 03/17/2021 09:48 (36), 04/02/2021 00:30 (5), 04/02/2021 00:36 (18), 08/29/2025 09:35 (17), 03/30/2026 16:36 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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