---
title: "CVE-2025-30215: NATS Server may fail to authorize certain Jetstream admin APIs"
url: https://erroneo.us/security/cve/CVE-2025-30215/
description: "CVE-2025-30215 (github.com/nats-io/nats-server/v2 (Go)): NATS-Server is a High-Performance server for NATS.io, the cloud and edge native messaging system.…"
type: vulnerability-record
section: "Security Digest"
date_published: 2025-04-15
date_modified: 2026-06-05
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2025-30215"
kev: false
cvss: 9.6
epss: 0.00601
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2025-30215: NATS Server may fail to authorize certain Jetstream admin APIs

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.6% , percentile 48: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 48% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes github.com/nats-io/nats-server/v2 (Go) >= 2.11.0-RC.1, < 2.11.1, fixed in 2.11.1 ; github.com/nats-io/nats-server/v2 (Go) >= 2.2.0, < 2.10.27, fixed in 2.10.27 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- Go `github.com/nats-io/nats-server/v2` >= 2.11.0-RC.1, < 2.11.1 → fixed: 2.11.1
- Go `github.com/nats-io/nats-server/v2` >= 2.2.0, < 2.10.27 → fixed: 2.10.27

## Affected products (CVE record)

- nats-io nats-server: >= 2.2.0, < 2.10.27, >= 2.11.0-RC.1, < 2.11.1

## Severity

- GitHub_M CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H`
- GitHub CVSS 3.1: 9.6 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 0.60% probability of exploitation activity in the next 30 days; percentile 48.

## Sources

- [GitHub Advisory GHSA-fhg8-qxh5-7q3w](https://github.com/advisories/GHSA-fhg8-qxh5-7q3w)
- [CVE.org record CVE-2025-30215](https://www.cve.org/CVERecord?id=CVE-2025-30215)
- [NVD entry CVE-2025-30215](https://nvd.nist.gov/vuln/detail/CVE-2025-30215)
- [github.com](https://github.com/nats-io/nats-server/security/advisories/GHSA-fhg8-qxh5-7q3w)
- [advisories.nats.io](https://advisories.nats.io/CVE/secnote-2025-01.txt)
- [openwall.com](http://www.openwall.com/lists/oss-security/2025/04/08/5)
- [osv.dev](https://osv.dev/vulnerability/GO-2025-3600)
- [github.com](https://github.com/nats-io/nats-server/commit/3e7e4645a24e829a36b4210f2d7c34dea7f7a424)

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Source page: https://erroneo.us/security/cve/CVE-2025-30215/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt