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
3,124 results · Feed
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Medium 6.3
Improper verification of downloaded upgrades
The software downloads upgrade files without performing integrity checks, allowing the installation of tampered updates.
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High 8.0
AIS PersonnelService client performs unauthenticated doctor-specific operations
The shared client accepts caller-controlled doctor identifiers for read and write operations without requiring authentication or authorization credentials.
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Unscored —
Apache Airflow: CeleryExecutor: forged callback workloads run on Celery workers without workload-token validation
Apache Airflow's CeleryExecutor ran callback workloads (`ExecuteCallback`, used for deadline-alert callbacks) without validating the workload's authentication token. Anyone able to write to the Celery broker could enqueue a forged callback and execute arbitra…
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Medium 5.9
Vikunja before 2.7.1 Missing Step-Up Authentication via TOTP Enrollment Endpoints
Vikunja before 2.7.1 contains a missing authentication vulnerability that allows attackers holding a stolen session to enroll and enable TOTP without the account password. Attackers can call the TOTP enroll and enable endpoints with their own secret to lock t…
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Medium 6.4
fast-agent: `fast-agent serve` binds HTTP to 0.0.0.0 with no authentication by default; with --shell this is unauthenticated remote command execution
fast-agent is a framework for building, running, and evaluating AI agents with Model Context Protocol support. Prior to 0.7.21, fast-agent serve uses HTTP transport bound to 0.0.0.0 on port 8000 without authentication, allowing any network client that can rea…
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High 8.1
Lavish: DNS rebinding allows any website to read arbitrary local files and inject prompts into the AI agent via the unauthenticated local server
Lavish is the new editor for your HTML artifacts. Prior to 0.1.43, the lavish-axi loopback HTTP server did not authenticate requests or validate Host and Origin values on session, artifact, prompt, and polling routes. A website visited while the server is run…
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Medium 4.6
Hisense VIDAA Smart TV UPnP/DLNA Missing Authentication
Hisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains a missing authentication vulnerability in the UPnP/DLNA RenderingControl service on TCP port 38400 that allows a LAN-adjacent attacker to issue SetVolume, SetMute, and SelectPreset(FactoryDefaults) c…
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Medium 4.6
Hisense VIDAA Smart TV SSRF via SetAVTransportURI CurrentURI
Hisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains an input validation vulnerability in the UPnP/DLNA AVTransport SOAP service that allows a LAN-adjacent attacker to inject arbitrary URIs via the CurrentURI field of SetAVTransportURI without validati…
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Medium 6.3
Hisense VIDAA Smart TV DIAL Service Unauthenticated Access
Hisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains an unauthenticated access vulnerability in the DIAL (Discovery and Launch) service on TCP port 56789, which accepts control requests from any LAN-adjacent device without authentication, pairing, or u…
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High 8.8
Hisense VIDAA Smart TV Unauthenticated WebDriver Remote Access
Hisense VIDAA Smart TV firmware V0000.01.00a.P0220 contains an unauthenticated access vulnerability where a QA build of the Google Cobalt browser engine exposes the WebDriver automation server on TCP port 4444 across all network interfaces without any authent…
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High 7.5
Skyline DataMiner BrokerGateway Embedded API Key Authentication Bypass
Skyline DataMiner BrokerGateway contains an embedded API key vulnerability that allows unauthenticated attackers to retrieve the installation-specific BrokerGateway key even while pairing mode is disabled. Attackers can use the retrieved key to obtain the unr…
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Medium 6.7
In JetBrains IntelliJ IDEA before 2026.3 code execution was possible via the unauthenticated JDBC worker RMI endpoint
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Medium 5.0
In JetBrains CLion before 2026.3, 2026.2.4.1 missing authentication allowed local users to obtain the debug session env…
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Medium 6.9
FlexNet Beacon Missing Authentication Vulnerability
Missing authentication in the FlexNet Beacon component of Flexera One and FlexNet Manager Suite allows unauthenticated remote attackers to obtain Beacon policy and targeting information when anonymous web server access is enabled (the default).
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High 8.7
Lack of authentication and authorization in the Images.ashx endpoint in MatchPoint
Lack of authentication and authorization in the Images.ashx endpoint in MatchPoint, which allows profile photos to be downloaded using predictable identifiers. An unauthenticated remote attacker could enumerate these identifiers and collect users' photos. Lin…
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Medium 5.3
OpenEMR: Unauthenticated Information Disclosure in admin.php Exposes Database Names and Versions
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.3.0, the webroot admin.php multisite administration page is enabled without an authentication check, reads database configuration from sqlconf.…
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High 8.8
noname v1.11.2 through v1.11.6.1 Missing Authentication in Electron Local File Server
noname Electron desktop build v1.11.2 through v1.11.6.1 contains an unauthenticated local file server with wildcard CORS that allows malicious websites to read, overwrite, or delete installation files. Attackers can send cross-origin requests to /writeFile on…
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Low 3.7
EdgeChat before 2.20.3 Missing Authentication for Attachment Download via GET /files/:key
EdgeChat before 2.20.3 contains a missing authentication vulnerability in the GET /files/:key route that allows unauthenticated or banned users to download decrypted public-channel attachments because canAccessFile() accepts a null user id. Attackers holding …
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High 7.7
OpenHuman: Unauthenticated dictation WebSocket allows arbitrary audio streaming and unbounded memory growth
OpenHuman is an open-source agent harness available as a desktop application and Rust library. Before version 0.57.44, its local /ws/dictation WebSocket endpoint lacks client authentication and browser-origin validation. An unauthenticated client, including…
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High 8.4
OpenHuman: Unauthenticated Socket.IO RPC bypass allows invoking protected OpenHuman core controllers without the Bearer token
OpenHuman is an open-source agent harness available as a desktop application and Rust library. Before 0.56.0, the core server protects HTTP POST requests to /rpc with bearer middleware but exposes Socket.IO rpc:request and chat:start handlers without equivale…
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Medium 6.2
OpenHuman: Unauthenticated server-sent events endpoint leaks user-facing event data
OpenHuman is an open-source agent harness available as a desktop application and Rust library. Before 0.56.0, the local server exposes the server-sent events endpoint at /events without bearer authentication, permits cross-origin browser access, and uses only…
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High 7.3
Rapid7 Metasploit Framework Web Service unauthenticated bootstrap window allows creation of an administrator account without authentication
The Rapid7 Metasploit msf-ws suffers from a missing authentication vulnerability whereby the REST API grants an unauthenticated "bootstrap" exemption so that the very first administrator can be created when the users table is empty. While the table is empty, …
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High 7.3
OpenBMB Internet of Agents WebSocket Connection Manager app.py ConnectionManager.connect missing authentication
A security flaw has been discovered in OpenBMB Internet of Agents up to 9d78e88e47160eb42ee1ee8538c05e1c2c47877a. This affects the function ConnectionManager.connect of the file im_server/app.py of the component WebSocket Connection Manager. The manipulation …
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Unscored —
Apache OFBiz: REST API authentication bypassed by default when the auth attribute is omitted from a .rest.xml operation
Incorrect default value in the REST API framework's .rest.xml definition parser (ModelApiReader) in Apache OFBiz through 24.09.07 on all platforms allows a remote, unauthenticated attacker to invoke a REST API operation without providing valid credentials via…
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High 7.3
agentscope-ai AgentScope Agent Service deps.py get_current_user_id missing authentication
A vulnerability has been found in agentscope-ai AgentScope up to 2.0.11. This impacts the function get_current_user_id of the file src/agentscope/app/deps.py of the component Agent Service. Such manipulation of the argument X-User-ID leads to missing authenti…
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Medium 6.3
OpenHands Landing missing authentication
A vulnerability has been found in OpenHands up to 1.24.0. This impacts an unknown function of the component Landing Page. Such manipulation leads to missing authentication. The attack must be carried out from within the local network. The exploit has been dis…
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High 8.5
Telepresence: Traffic Manager gRPC has no auth — any pod claims arbitrary namespace and intercepts services, receiving victim environment secrets
Telepresence enables local development against a remote Kubernetes or OpenShift cluster. Prior to 2.31.0, the Traffic Manager gRPC API on port 8081 accepts unauthenticated cluster-network callers, ArriveAsClient stores a caller-supplied Namespace using only t…
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Critical 10.0
Linksys E5350 Setup Wizard apply.cgi save_settings missing authentication
A flaw has been found in Linksys E5350 1.0.00.037. This impacts the function save_settings of the file /wizard/apply.cgi of the component Setup Wizard. Executing a manipulation of the argument wizard_router_pwd can lead to missing authentication. The attack m…
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High 8.4
DeepSeek Harness Unauthenticated RPC Command Execution
DeepSeek Harness prior to 0.1.2-alpha.2, and specifically commit 3e24087, contains a missing authentication vulnerability in its web profile HTTP and WebSocket RPC control plane, allowing any local process, including those running as a different OS user, to r…
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High 7.3
yezhihao jt808-server Web Management API WebMvcConfig.addInterceptors missing authentication
A vulnerability was detected in yezhihao jt808-server up to a07f68c466b560b97ef41edb8a4966469abdf83e. Affected is the function WebMvcConfig.addInterceptors of the component Web Management API. The manipulation results in missing authentication. The attack may…
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High 8.3
SharpEmu: Cross-site request forgery in the debugger frontend leads to arbitrary process execution
SharpEmu is an experimental PlayStation 5 emulator for Windows and Linux. In version 0.0.3-release.3 and earlier, the repository-provided debugger frontend tooling is vulnerable while running. This tooling is not included in the release archives. The frontend…
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Critical 9.2
WatchGuard AuthPoint Gateway Improper Authentication Allows Unauthenticated Denial of Service
A Missing Authentication for Critical Function vulnerability in WatchGuard AuthPoint Gateway allows a remote unauthenticated attacker with network access to the AuthPoint Gateway host to disrupt authentication services and delete the local directory synchroni…
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High 8.8
About Time Technologies｜Herowatch Mini - Missing Authentication
Herowatch Mini developed by About Time Technologies has a Missing Authentication vulnerability. Unauthenticated remote attackers can connect to the affected device's ADB service and obtain an ADB shell, thereby accessing device resources or performing related…
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Critical 9.8
Quest Foglight for Databases ForgeMBeanServerSupport Missing Authentication Remote Code Execution Vulnerability
Quest Foglight for Databases ForgeMBeanServerSupport Missing Authentication Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Quest Foglight for Databases. Authentication is …
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Critical 9.8
Emerson Ovation Missing Authentication for Critical Functionality
Emerson Ovation has several protocols that have no authentication, which could allow an attacker to change controller configuration or cause a denial-of-service condition.
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Medium 5.3
NocoDB 0.300.0 before 2026.08.0 Unauthenticated OAuth Authorization Code Creation
NocoDB 0.300.0 before 2026.08.0 contains a missing authentication vulnerability in the POST /api/v2/oauth/authorize handler that allows unauthenticated attackers to create OAuth authorization codes. Attackers can send anonymous requests with client_id, redire…
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High 7.5
Yeti: Unauthenticated Access to Full Audit Timeline Discloses All Threat Intelligence Data
Yeti bridges the gap between CTI and DFIR practitioners by providing a Forensics Intelligence platform and pipeline. Prior to 2.5.1, YETI registers the audit router without Depends(auth.get_current_active_user), and core/web/apiv2/audit.py does not perform a …
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Low —
Arc has unauthenticated application log disclosure via `/api/v1/logs`
## Summary Arc exposes `GET /api/v1/logs` without authentication even when authentication is enabled by default. The route is registered before the global Fiber authentication middleware, and the handler returns recent buffered application logs without perfor…
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Medium 5.9
WPPConnect Server through 2.10.74 Missing Authentication via /api/:session/chatwoot
WPPConnect Server through 2.10.74 contains a missing authentication vulnerability that allows unauthenticated attackers to send WhatsApp messages by calling the Chatwoot webhook route without verifyToken middleware. Attackers who know or guess a connected ses…
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High 7.5
Foxel through 2.4.0 Unauthenticated File Read via /api/fs/stream and /api/fs/thumb
Foxel through 2.4.0 contains a missing authentication vulnerability that allows unauthenticated attackers to read files by requesting the /api/fs/stream and /api/fs/thumb endpoints. Attackers can supply a VFS mount prefix and relative path to retrieve full fi…