Weakness (CWE)
CWE-306: Missing Authentication for Critical Functionality
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
How to prevent it (5 mitigations)
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Architecture and Design
Divide the software into anonymous, normal, privileged, and administrative areas. Identify which of these areas require a proven user identity, and use a centralized authentication capability.
Identify all potential communication channels, or other means of interaction with the software, to ensure that all channels are appropriately protected, including those channels that are assumed to be accessible only by authorized parties. Developers sometimes perform authentication at the primary channel, but open up a secondary channel that is assumed to be private. For example, a login mechanism may be listening on one network port, but after successful authentication, it may open up a second port where it waits for the connection, but avoids authentication because it assumes that only the authenticated party will connect to the port.
In general, if the software or protocol allows a single session or user state to persist across multiple connections or channels, authentication and appropriate credential management need to be used throughout.
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Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
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Architecture and Design
Where possible, avoid implementing custom, "grow-your-own" authentication routines and consider using authentication capabilities as provided by the surrounding framework, operating system, or environment. These capabilities may avoid common weaknesses that are unique to authentication; support automatic auditing and tracking; and make it easier to provide a clear separation between authentication tasks and authorization tasks.
In environments such as the World Wide Web, the line between authentication and authorization is sometimes blurred. If custom authentication routines are required instead of those provided by the server, then these routines must be applied to every single page, since these pages could be requested directly.
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Architecture and Design
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator [REF-45].
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Implementation, System Configuration, Operation
When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data [REF-1297] [REF-1298] [REF-1302].
Source: MITRE CWE-306
1,266 results · Clear filters · Feed
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High 8.4
PMS 0.42 Stack-Based Buffer Overflow via Configuration File
PMS 0.42 contains a stack-based buffer overflow vulnerability that allows local unauthenticated attackers to execute arbitrary code by supplying malicious values in the configuration file. Attackers can craft configuration files with oversized input that over…
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High 7.3
OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication
A vulnerability was found in OpenBMB XAgent 1.0.0. This impacts the function check_user of the file XAgentServer/application/websockets/share.py of the component ShareServer WebSocket Endpoint. Performing a manipulation of the argument interaction_id results …
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High 8.8
Missing XPC Client & NSXPC endpoint validation leads to privilege escalation in Vienna Assistant (MacOS) - Vienna Symphonic Library
The VSL privileged helper does utilize NSXPC for IPC. The implementation of the "shouldAcceptNewConnection" function, which is used by the NSXPC framework to validate if a client should be allowed to connect to the XPC listener, does not validate clients at a…
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High 7.5
Galaxy Software Services｜Vitals ESP - Missing Authentication
Vitals ESP developed by Galaxy Software Services has a Missing Authentication vulnerability, allowing unauthenticated remote attackers to execute certain functions to obtain sensitive information.
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High 8.6
AVideo Vulnerable to Unauthenticated CDN Configuration Takeover via Empty Default Key Bypass and Mass-Assignment in status.json.php
WWBN AVideo is an open source video platform. In versions up to and including 26.0, the CDN plugin endpoints `plugin/CDN/status.json.php` and `plugin/CDN/disable.json.php` use key-based authentication with an empty string default key. When the CDN plugin is e…
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High 8.6
Authorization Bypass in HTTP Server Endpoints on TP-Link Archer NX200, NX210, NX500 and NX600
A missing authentication check in the HTTP server on TP-Link Archer NX200, NX210, NX500 and NX600 to certain cgi endpoints allows unauthenticated access intended for authenticated users. An attacker may perform privileged HTTP actions without authentication, …
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High 7.3
MacCMS Timming API Endpoint Timming.php weak authentication
A security flaw has been discovered in MacCMS 2025.1000.4052. This affects an unknown part of the file application/api/controller/Timming.php of the component Timming API Endpoint. The manipulation results in missing authentication. The attack may be performe…
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High 7.7
OpenClaw < 2026.2.21 - Missing VNC Authentication in Sandbox Browser noVNC Observer
OpenClaw versions prior to 2026.2.21 sandbox browser entrypoint launches x11vnc without authentication for noVNC observer sessions, allowing unauthenticated access to the VNC interface. Remote attackers on the host loopback interface can connect to the expose…
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High 7.5
NLTK has unauthenticated remote shutdown in nltk.app.wordnet_app
NLTK (Natural Language Toolkit) is a suite of open source Python modules, data sets, and tutorials supporting research and development in Natural Language Processing. In versions 3.9.3 and prior, `nltk.app.wordnet_app` allows unauthenticated remote shutdown o…
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High 7.5
SiYuan has an Unauthenticated WebSocket DoS via Auth Keepalive Bypass
SiYuan is a personal knowledge management system. Prior to version 3.6.2, the SiYuan kernel WebSocket server accepts unauthenticated connections when a specific "auth keepalive" query parameter is present. After connection, incoming messages are parsed using …
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High 8.1
AVideo affected by unauthenticated application takeover via exposed web installer on uninitialized deployments
WWBN AVideo is an open source video platform. Versions 25.0 and below are vulnerable to unauthenticated application takeover through the install/checkConfiguration.php endpoint. install/checkConfiguration.php performs full application initialization: database…
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High 8.2
Authentication Bypass under Actuator Health groups paths
Spring Boot applications with Actuator can be vulnerable to an "Authentication Bypass" vulnerability when an application endpoint that requires authentication is declared under a specific path, already configured for a Health Group additional path. This issue…
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High 7.3
BMC FootPrints ITSM 20.20.02 <= 20.24.01.001 Authentication Bypass
BMC FootPrints ITSM versions 20.20.02 through 20.24.01.001 contain an authentication bypass vulnerability due to improper enforcement of security filters on restricted REST API endpoints and servlets. Unauthenticated remote attackers can bypass access control…
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High 7.8
Insufficient XPC Client validation leading to local privilege escalation in Arturia Software Center
The "Privileged Helper" component of the Arturia Software Center (MacOS) does not perform sufficient client code signature validation when a client connects. This leads to an attacker being able to connect to the helper and execute privileged actions leading …
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High 8.1
Keycloak: keycloak: unauthorized authentication via disabled saml identity provider
A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider (IdP) to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker…
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High 7.5
Cloud Foundry unprotected internal endpoints
Unprotected internal endpoints in Cloud Foundry Capi Release 1.226.0 and below, and CF Deployment v54.9.0 and below on all platforms allows any user who has bypassed the firewall to potentially replace droplets and therefore applications allowing them to acce…
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High 7.1
IBM Sterling B2B Integrator and IBM Sterling File Gateway Improper Access Controls
IBM Sterling B2B Integrator and IBM Sterling File Gateway 6.1.0.0 through 6.1.2.7_2, 6.2.0.0 through 6.2.0.5_1, 6.2.1.0 through 6.2.1.1_1, and 6.2.2.0 allows a remote unauthenticated attacker to view and delete the partners of a community and to delete the co…
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High 8.7
TIBCO BPM Enterprise Remote Code Execution (RCE) Vulnerability
Configuration issue in Java Management Extensions (JMX) in TIBCO BPM Enterprise version 4.x allows unauthorised access.
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High 7.5
Angeet ES3 KVM unauthenticated arbitrary file write
The Angeet ES3 KVM allows a remote, unauthenticated attacker to write arbitrary files, including configuration files or system binaries. Modified configuration files or system binaries could allow an attacker to take complete control of a vulnerable system.
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High 8.2
Sipeed NanoKVM unauthenticated Wi-Fi configuration endpoint
Sipeed NanoKVM before 2.3.1 exposes a Wi-Fi configuration endpoint without proper security checks, allowing an unauthenticated attacker with network access to change the saved configured Wi-Fi network to one of the attacker's choosing, or craft a request to e…
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High 7.5
Telesquare SKT LTE Router SDT-CS3B1 Unauthenticated Remote Reboot
Telesquare SKT LTE Router SDT-CS3B1 software version 1.2.0 contains an unauthenticated remote reboot vulnerability that allows attackers to trigger device reboot without authentication. Attackers can send POST requests to the lte.cgi endpoint with the Command…
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High 7.5
Serviio PRO 1.8 Unauthenticated Password Change via REST API
Serviio PRO 1.8 contains an improper access control vulnerability in the Configuration REST API that allows unauthenticated attackers to change the mediabrowser login password. Attackers can send specially crafted requests to the REST API endpoints to modify …
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High 7.5
Serviio PRO 1.8 REST API Information Disclosure
Serviio PRO 1.8 contains an information disclosure vulnerability due to improper access control enforcement in the Configuration REST API that allows unauthenticated attackers to access sensitive information. Remote attackers can send specially crafted reques…
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High 8.1
Philips Hue Bridge HomeKit Accessory Protocol Transient Pairing Mode Authentication Bypass Vulnerability
Philips Hue Bridge HomeKit Accessory Protocol Transient Pairing Mode Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Philips Hue Bridge. Authentication is not requ…
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High 7.6
LibreChat MCP OAuth callback does not validate browser session — allows token theft via redirect link
LibreChat is a ChatGPT clone with additional features. From 0.8.2 to 0.8.2-rc3, The MCP (Model Context Protocol) OAuth callback endpoint accepts the redirect from the identity provider and stores OAuth tokens for the user who initiated the flow, without verif…
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High 7.5
Dagu SSE Authentication Bypass in Basic Auth Mode
Dagu is a workflow engine with a built-in Web user interface. Prior to 2.2.4, when Dagu is configured with HTTP Basic authentication (DAGU_AUTH_MODE=basic), all Server-Sent Events (SSE) endpoints are accessible without any credentials. This allows unauthentic…
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High 8.3
Configuration Data Spill
Missing authentication for critical function vulnerability in ABB AWIN GW100 rev.2, ABB AWIN GW120.This issue affects AWIN GW100 rev.2: 2.0-0, 2.0-1; AWIN GW120: 1.2-0, 1.2-1.
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High 8.2
ZeptoClaw: Generic webhook channel trusts caller-supplied identity fields; allowlist is checked against untrusted payload data
ZeptoClaw is a personal AI assistant. Prior to 0.7.6, the generic webhook channel trusts caller-supplied identity fields (sender, chat_id) from the request body and applies authorization checks to those untrusted values. Because authentication is optional and…
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High 7.7
Runtipi unauthenticated /api/auth/reset-password allows operator account takeover during active reset window
Runtipi is a personal homeserver orchestrator. Prior to 4.8.0, an unauthenticated attacker can reset the operator (admin) password when a password-reset request is active, resulting in full account takeover. The endpoint POST /api/auth/reset-password is expos…
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High 8.4
Comtrend AR-5310 GE31-412SSG-C01_R10.A2pG039u.d24k Restricted Shell Escape
Comtrend AR-5310 GE31-412SSG-C01_R10.A2pG039u.d24k contains a restricted shell escape vulnerability that allows local users to bypass command restrictions by using the command substitution operator $( ). Attackers can inject arbitrary commands through the $( …
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High 7.5
Azure IoT Explorer Information Disclosure Vulnerability
Missing authentication for critical function in Azure IoT Explorer allows an unauthorized attacker to disclose information over a network.
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High 7.5
FileBrowser Quantum Incomplete Remediation of CVE-2026-27611: Password-Protected Share Bypass via /public/api/share/info
FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, the remediation for CVE-2026-27611 is incomplete. Password protected shares still disclose tokenized downloadURL via /public/api/share/info. This vulnera…
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High 7.5
RCE in TUBITAK BILGEM's Liderahenk
Missing Authentication for Critical Function vulnerability in TUBITAK BILGEM Software Technologies Research Institute Liderahenk allows Remote Code Inclusion, Privilege Abuse, Command Injection. This issue affects Liderahenk: before 3.5.1.
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High 7.7
Flowise: Missing Authentication on NVIDIA NIM Endpoints
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.0.13, the NVIDIA NIM router (/api/v1/nvidia-nim/*) is whitelisted in the global authentication middleware, allowing unauthenticated access to privilege…
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High 8.7
XikeStor SKS8310-8X switch_config.src Missing Authentication
XikeStor SKS8310-8X Network Switch firmware versions 1.04.B07 and prior contain a missing authentication vulnerability in the /switch_config.src endpoint that allows unauthenticated remote attackers to download device configuration files. Attackers can access…
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High 8.7
Wekan Exposes All Global Webhook Integrations through globalwebhooks Publication
Wekan is an open source kanban tool built with Meteor. In versions 8.31.0 through 8.33, the globalwebhooks publication exposes all global webhook integrations—including sensitive url and token fields—without performing any authentication check on the server s…
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High 7.5
Navtor NavBox exposes sensitive configuration and operational data due to missing authentication on HTTP API endpoints.…
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High 8.7
Chartbrew: Unauthenticated Chart Filter Endpoint: POST /project/:project_id/chart/:chart_id/filter missing verifyToken + checkPermissions
Chartbrew is an open-source web application that can connect directly to databases and APIs and use the data to create charts. Prior to version 4.8.4, the chart filter endpoint POST /project/:project_id/chart/:chart_id/filter is missing both verifyToken and c…
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High 8.6
Payment Orchestrator Service Elevation of Privilege Vulnerability
Payment Orchestrator Service Elevation of Privilege Vulnerability
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High 8.4
OpenClaw 2026.1.5 < 2026.2.12 - Missing Authentication in Browser Control HTTP Endpoints
OpenClaw versions 2026.1.5 prior to 2026.2.12 fail to enforce mandatory authentication on the /agent/act browser-control HTTP route, allowing unauthorized local callers to invoke privileged operations. Remote attackers on the local network or local processes …