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 8.8
SurrealDB before 3.1.0 Session Hijacking via /rpc sessions
SurrealDB versions before 3.1.0 contain a session hijacking vulnerability where the HTTP /rpc sessions method returns attached session UUIDs without authentication and accepts arbitrary session fields with no ownership verification. Unauthenticated attackers …
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High 7.3
newpanjing simpleui AjaxAdmin AJAX Endpoint admin.py self.get_action missing authentication
A vulnerability was found in newpanjing simpleui 2026.01.13. This affects the function self.get_action of the file simpleui/admin.py of the component AjaxAdmin AJAX Endpoint. Performing a manipulation results in missing authentication. Remote exploitation of …
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High 7.3
Gerapy Project Upload Endpoint views.py missing authentication
A vulnerability has been found in Gerapy up to 0.9.13. The impacted element is an unknown function of the file gerapy/server/core/views.py of the component Project Upload Endpoint. Such manipulation leads to missing authentication. The attack may be launched …
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High 7.5
Authentication Bypass in Vimesoft's Enterprise Video Platform
Missing authentication for critical function vulnerability in Vimesoft Inc. Enterprise Video Platform allows Authentication Bypass. This issue affects Enterprise Video Platform: from 3.11.0.0 before 3.25.0.
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High 7.5
Open Event Server 1.19.1 Unauthenticated Member Roster Export via CSV Export Endpoint
Open Event Server through 1.19.1 contains a missing authentication vulnerability that allows unauthenticated attackers to export the complete member roster of any group, including email addresses, names, join dates, and roles, by submitting requests to the gr…
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High 8.6
SimpleChat plugin validation endpoints missing authentication and authorization
SimpleChat is a secure AI conversation application with personal and group workspaces for document-grounded interactions. Prior to 0.241.206, several plugin validation routes in application/single_app/plugin_validation_endpoint.py, including `POST /api/admin/…
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High 7.1
EQ-3 Eqiva CC-RT-BLE Bluetooth Smart Radiator Thermostat Firmware up to the latest version 1.46 was discovered to allow…
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High 8.2
GPUStack Unauthenticated Information Disclosure via Worker Endpoints
GPUStack through 2.2.1, fixed in commit 4e20551, contains an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to access sensitive inference logs and modify worker configuration by exploiting unprotected /serveLogs and…
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High 7.7
Cursor: Cloud Agent Browser Sandbox Escape
Cursor is a code editor built for programming with AI. Prior to the Cloud Agent fix on 03/31/2026, browser-enabled Cursor Cloud Agent sessions allowed attacker-controlled web content to connect from inside the agent container to an unauthenticated local agent…
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High 8.6
PraisonAI before 4.6.78 Missing Webhook Signature Verification
PraisonAI before 4.6.78 fails to verify Svix webhook signatures in AgentMail webhook mode, allowing unauthenticated attackers to forge message.received events. Attackers can send crafted JSON payloads to the webhook endpoint to invoke configured agents with a…
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High 8.2
PraisonAI before 4.6.78 Authentication Bypass via Host Header Spoofing
PraisonAI before 4.6.78 contains an authentication bypass in the Call API agent invocation endpoints (src/praisonai/praisonai/api/agent_invoke.py) when PRAISONAI_CALL_AUTH=disabled is configured. The safeguard intended to restrict the disabled-auth opt-out to…
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High 7.3
PraisonAI before 4.6.78 Authentication Bypass via HTTP-stream
PraisonAI before 4.6.78 exposes the MCP HTTP-stream transport without authentication by default: the CLI --api-key option defaults to None, and the server only enforces Authorization/Bearer checks when an API key is configured. When an operator runs 'praisona…
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High 7.3
NVIDIA TensorRT-LLM for Linux contains a vulnerability in the disaggregated orchestrator component, where an attacker c…
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High 8.6
Adobe Experience Manager | Missing Authentication for Critical Function (CWE-306)
Adobe Experience Manager is affected by a Missing Authentication for Critical Function vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. …
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High 8.8
Windows Server Update Service (WSUS) Elevation of Privilege Vulnerability
Missing authentication for critical function in Windows Server Update Service allows an authorized attacker to elevate privileges over a network.
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High 7.1
Windows Routing and Remote Access Service (RRAS) Elevation of Privilege Vulnerability
Missing authentication for critical function in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.
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High 7.8
Windows Spaceport.sys Elevation of Privilege Vulnerability
Missing authentication for critical function in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally.
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High 8.8
Azure CycleCloud Elevation of Privilege Vulnerability
Missing authentication for critical function in Azure CycleCloud allows an authorized attacker to elevate privileges over a network.
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High 8.9
Argo-cd: argo cd unauthenticated remote code execution in repo-server via generatemanifest grpc endpoint
A flaw was identified in Argo CD, the GitOps engine used by Red Hat OpenShift GitOps, that could allow an unauthenticated attacker with network access to the Argo CD repo-server to achieve remote code execution. Under certain conditions, the attacker may then…
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High 7.3
RafyMrX TOKO-ONLINE-ROTI missing authentication
A weakness has been identified in RafyMrX TOKO-ONLINE-ROTI up to ddfe1cd587be0a0b5135d8b6e85cce2ec3aece99. This affects an unknown part. This manipulation causes missing authentication. The attack is possible to be carried out remotely. This product adopts a …
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High 8.6
PraisonAI before 1.7.3 Unauthenticated Agent Access via Insecure Defaults
PraisonAI before 1.7.3 contains an insecure default configuration that binds to all interfaces with no API key requirement and wildcard CORS. Unauthenticated attackers can call GET /api/agents to read agent instructions and system prompts, or POST /api/chat t…
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High —
Clauster: Non-loopback deployments can serve the dashboard unauthenticated when auth.enabled is unset
### Summary A Clauster instance bound to a **non-loopback** address (e.g. `0.0.0.0` or a LAN IP) can serve the entire dashboard and its API **without any authentication** — even when the operator has configured a password — if `auth.enabled` is left at its de…
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High 8.3
9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIs
9Router is an AI router & token saver. Prior to 0.5.2, 9router treats loopback requests as trusted and allows /v1/* access without an API key, so a same-host reverse proxy that forwards public traffic to the backend through 127.0.0.1 causes src/dashboardGuard…
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High 7.5
ST Engineering iDirect iQ-Series Terminals Missing authentication for critical function
The iDirect iQ200 exposes the /api/identity and /api/ REST API endpoints without authentication. An unauthenticated attacker with network access can retrieve sensitive device information including the serial number, Device ID (DID), Terminal Private Key ident…
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High 7.2
PraisonAI before 4.6.78 Unauthenticated SSRF via webhook_url
PraisonAI before 4.6.78 contains an unauthenticated server-side request forgery vulnerability in the Jobs API /api/v1/runs endpoint. The webhook_url parameter is validated at request time but re-resolved at connection time, allowing attackers to use DNS rebin…
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High 7.5
Apache IoTDB: Unauthenticated heap-exhaustion DoS via unbounded allocation in IoTDB AirGap pipe receiver
Memory Allocation with Excessive Size Value, Allocation of Resources Without Limits or Throttling, Missing Authentication for Critical Function vulnerability in Apache IoTDB. When pipe_air_gap_receiver_enabled=true, the IoTDB AirGap pipe receiver accepts raw …
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High 8.8
Mockoon: Unauthenticated admin API + wildcard CORS allows mock-state hijack and secret theft
Mockoon provides way to design and run mock APIs. Prior to 9.7.0, Mockoon's admin API in commons-server/src/libs/server/admin-api.ts is mounted on the same Express listener as user-defined mock routes, enabled by default in shipped runtimes, serves Access-Con…
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High 7.5
Fluentd: Exposure of Sensitive Information via Monitor Agent API
Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Prior to 1.19.3, Fluentd's Monitor Agent plugin in_monitor_agent exposes internal metrics and plugin information via a REST API, and respon…
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High 8.8
LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallbac…
KEV Sep 2, 2026 -
High 8.3
Serena: Unauthenticated Flask dashboard on fixed port enables DNS rebinding → memory poisoning → RCE
Serena is a powerful MCP toolkit for coding that provides semantic retrieval and editing capabilities. Prior to v1.5.2, Serena's built-in web dashboard exposes an unauthenticated Flask API on a fixed, predictable port, with no authentication, no CSRF protecti…
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High 7.5
An issue in Oneblog V2.3.9 allows a remote attacker to obtain sensitive information via the RestApiController.java, JsA…
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High 7.7
FOSSBilling missing authorization in guest Invoice API endpoints
FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, the Guest API invoice/update endpoint is missing an authorization check present in other invoice-related endpoints, allowing an unauthenticated user with knowledg…
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High 7.3
jairiidriss restaurant-website-php-mysql AJAX Endpoint ajax_files missing authentication
A vulnerability was found in jairiidriss restaurant-website-php-mysql up to 521428b5b612449df0cf4a5d15ee40cba67f3d35. This vulnerability affects unknown code of the file /admin/ajax_files of the component AJAX Endpoint. Performing a manipulation results in mi…
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High 8.8
In affected versions of Eclipse Theia (1.8.1 and later), the browser backend exposes privileged terminal RPC over WebSo…
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High 8.8
GeoVision GeoWebPlayer 1.1.1.0 Websocket Server function vulnerability
GeoWebPlayer (also called "Web Plugin" in the GV-VMS documentation and "WS Player" for VMS-Cloud) is an addon that can be installed with various GeoVision software (GV-VMS, GV-Cloud, ...). It creates a websocket server that expands the capabilities of the var…
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High 8.1
Capgo - Account Deletion Without Password Confirmation
Capgo before 12.128.2 contains an authentication bypass vulnerability in the account deletion endpoint that allows deletion without password re-authentication or secondary verification. Attackers can delete user accounts via session hijacking, CSRF attacks, o…
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High 7.5
JimuReport 2.5.0 - Unauthenticated Report Export via /jmreport/auto/export
JimuReport through 2.5.0 exposes the POST /jmreport/auto/export endpoint without authentication: the handler is annotated @JimuNoLoginRequired, so JimuReportTokenInterceptor skips all authentication and authorization, and the export service streams the render…
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High 7.0
Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook
A Rancher FleetWorkspace admission path allowed side effects to occur in the Rancher webhook handler for versions 0.7.0 up to 0.7.10, 0.8.0 up to 0.8.7, 0.9.0 up to 0.9.6 and 0.10.0 up to 0.10.7. An unauthenticated attacker with network access to the in-clust…
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High 7.3
Feehi CMS REST API Endpoint articles missing authentication
A vulnerability was found in Feehi CMS up to 2.1.1. This vulnerability affects unknown code of the file /api/articles of the component REST API Endpoint. Performing a manipulation results in missing authentication. The attack may be initiated remotely. The ex…
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High 7.4
Budibase: Unauthenticated S3 signed upload URL generation allows arbitrary writes with stored datasource credentials
Budibase is an open-source low-code platform. Prior to 3.39.3, the application server exposes an unauthenticated endpoint that generates S3 PutObject presigned URLs using credentials stored in a workspace datasource. The route is protected only by the recaptc…