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
229 results · Clear filters · Feed
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Critical 9.8
On F5 BIG-IP 16.1.x versions prior to 16.1.2.2, 15.1.x versions prior to 15.1.5.1, 14.1.x versions prior to 14.1.4.6, 1…
KEV May 10, 2022 -
Unscored —
Tatsu < 3.3.12 - Unauthenticated RCE
The Tatsu WordPress plugin before 3.3.12 add_custom_font action can be used without prior authentication to upload a rogue zip file which is uncompressed under the WordPress's upload directory. By adding a PHP shell with a filename starting with a dot ".", th…
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Critical 9.8
Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: OpenSSO Agent). Supported ve…
KEV Nov 28, 2022 -
Unscored —
security vulnerability on unauthorized access.
In Apache APISIX Dashboard before 2.10.1, the Manager API uses two frameworks and introduces framework `droplet` on the basis of framework `gin`, all APIs and authentication middleware are developed based on framework `droplet`, but some API directly use the …
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Critical 9.8
Zoho ManageEngine ServiceDesk Plus before 11306, ServiceDesk Plus MSP before 10530, and SupportCenter Plus before 11014…
KEV Dec 1, 2021 -
Critical 9.8
UDP Technology/Geutebrück camera devices: Authentication Bypass
Multiple camera devices by UDP Technology, Geutebrück and other vendors allow unauthenticated remote access to sensitive files due to default user authentication settings. This can lead to manipulation of the device and denial of service.
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Critical 9.8
Apache Airflow: Variable Import endpoint missed authentication check
The variable import endpoint was not protected by authentication in Airflow >=2.0.0, <2.1.3. This allowed unauthenticated users to hit that endpoint to add/modify Airflow variables used in DAGs, potentially resulting in a denial of service, information disclo…
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High 8.5
XStream is vulnerable to a Remote Command Execution attack
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker has sufficient rights to execute commands of the host only by manipulating the processed input stream. No user is affec…
KEV Mar 10, 2023 -
Medium 5.3
Cisco HyperFlex HX Data Platform File Upload Vulnerability
A vulnerability in the web-based management interface of Cisco HyperFlex HX Data Platform could allow an unauthenticated, remote attacker to upload files to an affected device. This vulnerability is due to missing authentication for the upload function. An at…
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High 8.6
Authentication bypass
Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, when configured to use authentication (-Dnacos.core.auth.enabled=true) Nacos uses the AuthFilter servlet filter to enforce auth…
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High 8.6
Authentication bypass
Nacos is a platform designed for dynamic service discovery and configuration and service management. In Nacos before version 1.4.1, the ConfigOpsController lets the user perform management operations like querying the database or even wiping it out. While the…
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Unscored —
Access to the Advantech iView versions prior to v5.7.03.6112 configuration are missing authentication, which may allow …
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Critical 9.8
Authentication bypass in Apache Airflow
The previous default setting for Airflow's Experimental API was to allow all API requests without authentication, but this poses security risks to users who miss this fact. From Airflow 1.10.11 the default has been changed to deny all requests by default and …
KEV Jan 18, 2022 -
High 8.8
TP-Link TL-WA855RE V5 20200415-rel37464 devices allow an unauthenticated attacker (on the same network) to submit a TDD…
KEV Sep 2, 2025 -
Medium 6.5
A Default Configuration vulnerability in FortiOS may allow an unauthenticated attacker on the same subnet to intercept …
KEV Nov 3, 2021 -
High 7.5
Microweber Discloses Sensitive Information
userfiles/modules/users/controller/controller.php in Microweber before 1.1.20 allows an unauthenticated user to disclose the users database via a /modules/ POST request.
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Critical 10.0
SAP NetWeaver AS JAVA (LM Configuration Wizard), versions - 7.30, 7.31, 7.40, 7.50, does not perform an authentication …
KEV Nov 3, 2021 -
Critical 9.8
Improper Authentication in Apache Spark
In Apache Spark 2.4.5 and earlier, a standalone resource manager's master may be configured to require authentication (spark.authenticate) via a shared secret. When enabled, however, a specially-crafted RPC to the master can succeed in starting an application…
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Unscored —
The affected product lacks proper authentication required to query the server on the Ignition 8 Gateway (versions prior…
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Critical 9.8
SaltStack Salt Unauthenticated Remote Code Execution
An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2. The salt-master process ClearFuncs class does not properly validate method calls. This allows a remote user to access some methods without authentication. These methods can be u…
KEV Nov 3, 2021 -
Unscored —
ABB MicroSCADA Pro SYS600 Missing Authentication for Critical Function
ABB MicroSCADA Pro SYS600 version 9.3 suffers from an instance of CWE-306: Missing Authentication for Critical Function.
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Critical 9.8
Under certain conditions, vmdir that ships with VMware vCenter Server, as part of an embedded or external Platform Serv…
KEV Nov 3, 2021 -
Critical 10.0
SAP Solution Manager (User Experience Monitoring), version- 7.2, due to Missing Authentication Check does not perform a…
KEV Nov 3, 2021 -
Unscored —
RouterOS versions 6.45.6 Stable, 6.44.5 Long-term, and below allow remote unauthenticated attackers to trigger DNS quer…
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Unscored —CVE-2019-10915 Public exploit
A vulnerability has been identified in TIA Administrator (All versions < V1.0 SP1 Upd1). The integrated configuration w…
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High 8.8
ThinkPHP before 3.2.4, as used in Open Source BMS v1.1.1 and other products, allows Remote Command Execution via public…
KEV Nov 3, 2021 -
Unscored —
AVEVA Software, LLC InduSoft Web Studio prior to Version 8.1 SP3 and InTouch Edge HMI (formerly InTouch Machine Edition…
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High 7.5
Vulnerability in the Oracle WebLogic Server component of Oracle Fusion Middleware (subcomponent: WLS Security). Support…
KEV Feb 10, 2022 -
Critical 10.0
Phoenix Contact Software ProConOs and MultiProg Missing Authentication for Critical Function
Phoenix Contact ProConOs and MultiProg do not require authentication, which allows remote attackers to execute arbitrary commands via protocol-compliant traffic.