What is the CVSS score of CVE-2026-30947?

CVE-2026-30947 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-30947?

Within 24 hours: Identify all Parse Server instances in production and document their versions. Within 7 days: Apply vendor patches (upgrade to 9.5.2-alpha.3 or 8.6.16 or later) across all affected instances, prioritizing systems handling sensitive data. Within 30 days: Conduct audit of LiveQuery access logs to detect unauthorized subscriptions and validate patch deployment across entire infrastructure.

Parse Server CVE-2026-30947

HIGH

Incorrect Authorization (CWE-863)

2026-03-10 security-advisories@github.com

GHSA-7ch5-98q2-7289

Node.js Parse Server Parseplatform

7.5

CVSS 3.1 · GitHub Advisory

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Connect to LiveQuery endpoint
Exploit

Subscribe to CLP-protected class
Execution

Receive unauthorized real-time object events
Impact

Access restricted data

Vulnerability Assessment

Weakness	CWE CWE-863 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Authorization logic validation MITRE ATT&CK 1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Parse Server with LiveQuery enabled and class-level permissions configured. No authentication required; unauthenticated clients can exploit default LiveQuery deployments.
Impact	CVSS 7.5 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: None. Exploitation no authentication required.
Exploit ScenarioDerived	An attacker without authentication could exploit this vulnerability to compromise the affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Parse Server versions prior to 9.5.2-alpha.3 and 8.6.16 fail to enforce class-level permissions on LiveQuery subscriptions, allowing unauthenticated attackers to subscribe to restricted data classes and receive real-time updates on all objects. This authorization bypass affects all deployments using LiveQuery with permission controls, exposing sensitive data to unauthorized subscribers. A patch is available in the mentioned versions.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:55 CVSS 7.5

RemediationAI

A vendor patch is available — apply it immediately. Fixed in version 9.5.2. Restrict network access to the affected service where possible.

Affected Packages

npm parse-server fix: 8.6.16, 9.5.2-alpha.3

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in npm

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-863 (Incorrect Authorization). Affects Parse-Server. Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.3 and 8.6.16, class-level permissions (CLP) are not enforced for LiveQuery subscriptions. An unauthenticated or unauthorized client can subscribe to any LiveQuery-enabled class and receive real-time events for all objects, regardless of CLP restrictions. All Parse Server deployments that use LiveQuery with class-level permissions are affected. Data intended to be restricte

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory PRIMARY 7.5 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Patch released

Mar 11, 2026 - 17:15 nvd

Patch available

CVE Published

Mar 10, 2026 - 21:16 nvd

HIGH 7.5

DescriptionGitHub Advisory

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2-alpha.3 and 8.6.16, class-level permissions (CLP) are not enforced for LiveQuery subscriptions. An unauthenticated or unauthorized client can subscribe to any LiveQuery-enabled class and receive real-time events for all objects, regardless of CLP restrictions. All Parse Server deployments that use LiveQuery with class-level permissions are affected. Data intended to be restricted by CLP is leaked to unauthorized subscribers in real time. This vulnerability is fixed in 9.5.2-alpha.3 and 8.6.16.

Executive ViewAI

Why It Matters

Parse Server deployments are vulnerable to unauthorized data access through LiveQuery subscriptions, which bypass class-level permission controls. Organizations using Parse Server for backend services may experience data breaches if attackers subscribe to sensitive data streams without proper authentication, potentially exposing customer information and intellectual property.

Business Impact: High

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: disable LiveQuery feature until patch is applied, implement network segmentation to restrict LiveQuery endpoint access to trusted clients only, deploy WAF rules to monitor and block suspicious subscription patterns, and enforce API authentication tokens with minimal lifetime for all client connections.

Threat Intelligence Overview

EPSS Score

0.0%

Top 98% exploitable

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.0%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.