VDB-243883 · CVE-2023-47090 · GHSA-fr2g-9hjm-wr23

NATS nats-server up to 2.9.22/2.10.1 improper authentication

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.2	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in NATS nats-server up to 2.9.22/2.10.1 and classified as critical. This affects an unknown part. This manipulation causes improper authentication. This vulnerability appears as CVE-2023-47090. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in NATS nats-server up to 2.9.22/2.10.1. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

NATS nats-server before 2.9.23 and 2.10.x before 2.10.2 has an authentication bypass. An implicit $G user in an authorization block can sometimes be used for unauthenticated access, even when the intention of the configuration was for each user to have an account. The earliest affected version is 2.2.0.

The weakness was presented 10/30/2023 as GHSA-fr2g-9hjm-wr23. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-47090. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2.9.23 or 2.10.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-2730). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

NATS

Name

nats-server

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: nats-server 2.9.23/2.10.2

Timelineinfo

10/30/2023 🔍
10/30/2023 +0 days 🔍
10/30/2023 +0 days 🔍
10/07/2025 +708 days 🔍

Sourcesinfo

Advisory: GHSA-fr2g-9hjm-wr23
Status: Confirmed

CVE: CVE-2023-47090 (🔍)
GCVE (CVE): GCVE-0-2023-47090
GCVE (VulDB): GCVE-100-243883
EUVD: 🔍

Entryinfo

Created: 10/30/2023 18:29
Updated: 10/07/2025 04:48
Changes: 10/30/2023 18:29 (39), 11/22/2023 10:15 (1), 11/22/2023 10:21 (11), 10/07/2025 04:48 (16)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.