Vulnerability Database

383,304

Total vulnerabilities in the database

CVE-2026-33421 — parse-server

Incorrect Authorization

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.53 and 9.6.0-alpha.42, Parse Server's LiveQuery WebSocket interface does not enforce Class-Level Permission (CLP) pointer permissions (readUserFields and pointerFields). Any authenticated user can subscribe to LiveQuery events and receive real-time updates for all objects in classes protected by pointer permissions, regardless of whether the pointer fields on those objects point to the subscribing user. This bypasses the intended read access control, allowing unauthorized access to potentially sensitive data that is correctly restricted via the REST API. This issue has been patched in versions 8.6.53 and 9.6.0-alpha.42.

CVSS v3:

  • Severity: Medium
  • Score: 6.5
  • AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CWEs:

Software Affected versions
Node.js icon parse-server >= 9.0.0, < 9.6.0-alpha.42
Node.js icon parse-server < 8.6.53
parseplatform / parse-server < 8.6.53
parseplatform / parse-server >= 9.0.0, < 9.6.0
parseplatform / parse-server = 9.6.0-alpha1
parseplatform / parse-server = 9.6.0-alpha10
parseplatform / parse-server = 9.6.0-alpha11
parseplatform / parse-server = 9.6.0-alpha12
parseplatform / parse-server = 9.6.0-alpha13
parseplatform / parse-server = 9.6.0-alpha14
parseplatform / parse-server = 9.6.0-alpha15
parseplatform / parse-server = 9.6.0-alpha16
parseplatform / parse-server = 9.6.0-alpha17
parseplatform / parse-server = 9.6.0-alpha18
parseplatform / parse-server = 9.6.0-alpha19
parseplatform / parse-server = 9.6.0-alpha2
parseplatform / parse-server = 9.6.0-alpha20
parseplatform / parse-server = 9.6.0-alpha21
parseplatform / parse-server = 9.6.0-alpha22
parseplatform / parse-server = 9.6.0-alpha23
parseplatform / parse-server = 9.6.0-alpha24
parseplatform / parse-server = 9.6.0-alpha25
parseplatform / parse-server = 9.6.0-alpha26
parseplatform / parse-server = 9.6.0-alpha27
parseplatform / parse-server = 9.6.0-alpha28
parseplatform / parse-server = 9.6.0-alpha29
parseplatform / parse-server = 9.6.0-alpha3
parseplatform / parse-server = 9.6.0-alpha30
parseplatform / parse-server = 9.6.0-alpha31
parseplatform / parse-server = 9.6.0-alpha32
parseplatform / parse-server = 9.6.0-alpha33
parseplatform / parse-server = 9.6.0-alpha34
parseplatform / parse-server = 9.6.0-alpha35
parseplatform / parse-server = 9.6.0-alpha36
parseplatform / parse-server = 9.6.0-alpha37
parseplatform / parse-server = 9.6.0-alpha38
parseplatform / parse-server = 9.6.0-alpha39
parseplatform / parse-server = 9.6.0-alpha4
parseplatform / parse-server = 9.6.0-alpha40
parseplatform / parse-server = 9.6.0-alpha41
parseplatform / parse-server = 9.6.0-alpha5
parseplatform / parse-server = 9.6.0-alpha6
parseplatform / parse-server = 9.6.0-alpha7
parseplatform / parse-server = 9.6.0-alpha8
parseplatform / parse-server = 9.6.0-alpha9

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.