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Fencer Vulns
critical 9.6

CVE-2025-30215 json

NATS-Server Fails to Authorize Certain Jetstream Admin APIs

published 2025-04-15 18 mo ago modified 2026-09-10 1 mo ago also BIT-nats-2025-30215 , EUVD-2025-11085 , GHSA-fhg8-qxh5-7q3w , GO-2025-3600

cvss
9.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

NATS-Server is a High-Performance server for NATS.io, the cloud and edge native messaging system. In versions starting from 2.2.0 but prior to 2.10.27 and 2.11.1, the management of JetStream assets happens with messages in the $JS. subject namespace in the system account; this is partially exposed into regular accounts to allow account holders to manage their assets. Some of the JS API requests were missing access controls, allowing any user with JS management permissions in any account to perform certain administrative actions on any JS asset in any other account. At least one of the unprotected APIs allows for data destruction. None of the affected APIs allow disclosing stream contents. This vulnerability is fixed in v2.11.1 or v2.10.27.

Patch / fix

  • go github.com/nats-io/nats-server/v2 2.10.27, 2.11.1
  • bitnami nats 2.11.1
  • linuxfoundation nats-server 2.10.27, 2.11.1
  • nats nats_server 2.10.27, 2.11.1
  • nats nats_streaming_server 2.10.27, 2.11.1
  • nats-server Debian 14, Debian 13 2.10.27-1

debian advisories DEBIAN-CVE-2025-30215

  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250422T152923-1.1

opensuse advisories openSUSE-SU-2025:15014-1

  • nats-server Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 2.10.27-r0

alpine advisories ALPINE-CVE-2025-30215

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • telegraf CBL-Mariner 2.0 1.29.4-15
  • telegraf Azure Linux 3.0 1.31.0-9

azure linux advisories AZL-60399AZL-60406

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-30215 updated cvss 9.6

nats-server: NATS-Server Fails to Authorize Certain Jetstream Admin APIs

  • Red Hat Trusted Profile Analyzer rhtpa/rhtpa-guac-rhel9
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/nats-io/nats-server/security/advisories/GHSA-fhg8-qxh5-7q3w referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
GitHub 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
OSV 3.1 9.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

Affected packages

ecosystem package affected fixed in
go github.com/nats-io/nats-server/v2
>=2.11.0-RC.1, <2.11.1
>=2.2.0, <2.10.27
>=2.11.0, <2.11.1
2.11.1
2.10.27
bitnami nats
>=2.2.0, <2.11.1
2.11.1

Affected products

  • nats-io nats-server

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality
  • CWE-287 Improper Authentication
  • CWE-285 Improper Authorization

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.