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 8.6
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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High 7.5
Fibaro Home Center Unauthenticated access to shutdown, reboot and reboot to recovery mode
In Fibaro Home Center 2 and Lite devices with firmware version 4.600 and older an internal management service is accessible on port 8000 and some API endpoints could be accessed without authentication to trigger a shutdown, a reboot or a reboot into recovery …
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High 8.2
Denial of service in Grafana
The snapshot feature in Grafana 6.7.3 through 7.4.1 can allow an unauthenticated remote attackers to trigger a Denial of Service via a remote API call if a commonly used configuration is set.
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High 8.8
GramAddict bot uses dependency with reverse tcp backdoor
GramAddict through 1.2.3 allows remote attackers to execute arbitrary code because of use of UIAutomator2 and ATX-Agent. The attacker must be able to reach TCP port 7912, e.g., by being on the same Wi-Fi network.
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High 7.8
Dell EMC PowerScale OneFS versions 8.2.0 - 9.1.0 contain a privilege escalation vulnerability. A non-admin user with ei…
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High 7.5
Cisco IoT Field Network Director Missing API Authentication Vulnerability
A vulnerability in the API of Cisco IoT Field Network Director (FND) could allow an unauthenticated, remote attacker to view sensitive information on an affected system. The vulnerability exists because the affected software does not properly authenticate API…
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High 7.5
SonarQube 8.4.2.36762 allows remote attackers to discover cleartext SMTP, SVN, and GitLab credentials via the api/setti…
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High 8.8
Authentication bypass in Apache Hadoop
Web endpoint authentication check is broken in Apache Hadoop 3.0.0-alpha4, 3.0.0-beta1, and 3.0.0. Authenticated users may impersonate any user even if no proxy user is configured.
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High 7.5
Missing Authentication for Critical Function in Apache NiFi
In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user c…
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High 8.2
WAGO: Vulnerability in web-based authentication in WAGO 750-8XX Version <= FW07
Improper Authentication vulnerability in WAGO 750-8XX series with FW version <= FW07 allows an attacker to change some special parameters without authentication. This issue affects: WAGO 750-852, WAGO 750-880/xxx-xxx, WAGO 750-881, WAGO 750-831/xxx-xxx, WAGO …
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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 -
High 7.5
Denial of service in Contour
In Contour ( Ingress controller for Kubernetes) before version 1.7.0, a bad actor can shut down all instances of Envoy, essentially killing the entire ingress data plane. GET requests to /shutdown on port 8090 of the Envoy pod initiate Envoy's shutdown proced…
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High 7.3
Cisco Data Center Network Manager Authentication Bypass Vulnerability
A vulnerability in the Device Manager application of Cisco Data Center Network Manager (DCNM) could allow an unauthenticated, remote attacker to bypass authentication and execute arbitrary actions on an affected device. The vulnerability is due to a failure i…
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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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High 7.5CVE-2020-12478 Scanner template
TeamPass files are available without authentication
TeamPass 2.1.27.36 allows an unauthenticated attacker to retrieve files from the TeamPass web root. This may include backups or LDAP debug files.
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High 8.3
The RSA Identity Governance and Lifecycle and RSA Via Lifecycle and Governance products prior to 7.1.1 P03 contain an I…
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High 7.4
An exploitable information disclosure vulnerability exists in the network packet handling functionality of Shadowsocks-…
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High 7.8
An exploitable code execution vulnerability exists in the ss-manager binary of Shadowsocks-libev 3.3.2. Specially craft…
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High 8.2
A CWE-306: Missing Authentication for Critical Function vulnerability exists which could cause a modification of device…
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High 7.3
Local root exploit via inclusion of attacker controlled shell script
Supportutils, before version 3.1-5.7.1, when run with command line argument -A searched the file system for a ndspath binary. If an attacker provides one at an arbitrary location it is executed with root privileges
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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 -
High 7.3
Cisco Policy Suite for Mobile and Cisco Policy Suite Diameter Routing Agent Software Redis Server Unauthenticated Access Vulnerability
A vulnerability in the Redis implementation used by the Cisco Policy Suite for Mobile and Cisco Policy Suite Diameter Routing Agent software could allow an unauthenticated, remote attacker to modify key-value pairs for short-lived events stored by the Redis s…
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High 7.5
Rockwell Automation MicroLogix 1400 Controllers and 1756 ControlLogix Communications Modules An unauthenticated, remote…
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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 -
High 7.5
Openstack Aodh can be used to launder Keystone trusts
Aodh as packaged in Openstack Ocata and Newton before change-ID I8fd11a7f9fe3c0ea5f9843a89686ac06713b7851 and before Pike-rc1 does not verify that trust IDs belong to the user when creating alarm action with the scheme trust+http, which allows remote authenti…
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High 7.5
Red hat network satellite: red hat network satellite: information disclosure via inter-satellite sync (iss) authentication bypass
A flaw was found in Red Hat Network Satellite. The Inter-Satellite Sync (ISS) operation, which synchronizes data between satellites, does not properly verify the authenticity of clients. This allows remote attackers to bypass the initial authentication proces…