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
51 results · Clear filters · Feed
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High 8.8CVE-2026-67277 Exploited
Kernel memory disclosure and denial of service in MikroTik RouterOS btest service
RouterOS accepts a "related" btest connection before the corresponding primary session has completed authentication. An unauthenticated client can use this state to start an IPv4 UDP test. With "random-data=false", the sender transmits an uninitialized tail f…
KEV Sep 10, 2026 -
Critical 9.8CVE-2026-72529 Exploited
A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server versions 5.3.X to 5.3.9, 5.…
KEV Aug 20, 2026 -
Medium 5.3
Microsoft SharePoint Server Elevation of Privilege Vulnerability
Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
KEV Jul 14, 2026 -
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 -
Critical 9.8
Vulnerability in the PeopleSoft Enterprise PeopleTools product of Oracle PeopleSoft (component: Updates Environment Man…
KEV Jun 12, 2026 -
Critical 9.8
Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise
In Splunk Enterprise 10.2 versions below 10.2.4 and 10 versions below 10.0.7, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint. The vulnerability exists because the PostgreSQL sidecar service endpo…
KEV Jun 18, 2026 -
Critical 9.8
Vulnerability in the Oracle Payments product of Oracle E-Business Suite (component: File Transmission). Supported versi…
KEV Jul 15, 2026 -
Critical 9.8
WebPros cPanel and WHM Authentication Bypass via Login Flow
cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
KEV Apr 30, 2026 -
Critical 9.3
marimo Affected by Pre-Auth Remote Code Execution via Terminal WebSocket Authentication Bypass
marimo is a reactive Python notebook. Prior to 0.23.0, Marimo has a Pre-Auth RCE vulnerability. The terminal WebSocket endpoint /terminal/ws lacks authentication validation, allowing an unauthenticated attacker to obtain a full PTY shell and execute arbitrary…
KEV Apr 23, 2026 -
Critical 9.3
Langflow has Unauthenticated Remote Code Execution via Public Flow Build Endpoint
Langflow is a tool for building and deploying AI-powered agents and workflows. In versions prior to 1.9.0, the POST /api/v1/build_public_tmp/{flow_id}/flow endpoint allows building public flows without requiring authentication. When the optional data paramete…
KEV Mar 25, 2026 -
Critical 9.3
SmarterTools SmarterMail < Build 9511 Unauthenticated RCE via ConnectToHub API
SmarterTools SmarterMail versions prior to build 9511 contain an unauthenticated remote code execution vulnerability in the ConnectToHub API method. The attacker could point the SmarterMail to the malicious HTTP server, which serves the malicious OS command. …
KEV Feb 5, 2026 -
High 7.8CVE-2025-48572 Exploited
In multiple locations, there is a possible way to launch activities from the background due to a permissions bypass. Th…
KEV Dec 2, 2025 -
Critical 9.8
Vulnerability in the Identity Manager product of Oracle Fusion Middleware (component: REST WebServices). Supported vers…
KEV Nov 21, 2025 -
High 8.7
Arbitrary Command Injection in Smartbedded MeteoBridge
The Meteobridge web interface let meteobridge administrator manage their weather station data collection and administer their meteobridge system through a web application written in CGI shell scripts and C. This web interface exposes an endpoint that is vulne…
KEV Oct 2, 2025 -
Critical 9.3
Commvault Command Center Innovation Release <= 11.38.25 Unathenticated Install Package Path Traversal
The Commvault Command Center Innovation Release allows an unauthenticated actor to upload ZIP files that represent install packages that, when expanded by the target server, are vulnerable to path traversal vulnerability that can result in Remote Code Executi…
KEV May 2, 2025 -
Critical 10.0
Erlang/OTP SSH Vulnerable to Pre-Authentication RCE
Erlang/OTP is a set of libraries for the Erlang programming language. Prior to versions OTP-27.3.3, OTP-26.2.5.11, and OTP-25.3.2.20, a SSH server may allow an attacker to perform unauthenticated remote code execution (RCE). By exploiting a flaw in SSH protoc…
KEV Jun 9, 2025 -
Critical 9.8
Langflow < 1.3.0 Unauthenticated RCE via /api/v1/validate/code
Langflow versions prior to 1.3.0 are susceptible to code injection in the /api/v1/validate/code endpoint. A remote and unauthenticated attacker can send crafted HTTP requests to execute arbitrary code.
KEV May 5, 2025 -
Medium 5.9
PAN-OS: Authentication Bypass in the Management Web Interface
An authentication bypass in the Palo Alto Networks PAN-OS software enables an unauthenticated attacker with network access to the management web interface to bypass the authentication otherwise required by the PAN-OS management web interface and invoke certai…
KEV Feb 18, 2025 -
Critical 9.8
ProjectSend Unauthenticated Configuration Modification
ProjectSend versions prior to r1720 are affected by an improper authentication vulnerability. Remote, unauthenticated attackers can exploit this flaw by sending crafted HTTP requests to options.php, enabling unauthorized modification of the application's conf…
KEV Dec 3, 2024 -
Medium 5.9
PAN-OS: Authentication Bypass in the Management Web Interface (PAN-SA-2024-0015)
An authentication bypass in Palo Alto Networks PAN-OS software enables an unauthenticated attacker with network access to the management web interface to gain PAN-OS administrator privileges to perform administrative actions, tamper with the configuration, or…
KEV Nov 18, 2024 -
Critical 10.0
upgrademysqlstatus in databases/views.py in CyberPanel (aka Cyber Panel) before 5b08cd6 allows remote attackers to bypa…
KEV Nov 7, 2024 -
Critical 9.8
A missing authentication for critical function in FortiManager 7.6.0, FortiManager 7.4.0 through 7.4.4, FortiManager 7.…
KEV Oct 23, 2024 -
Critical 9.1
PTZOptics NDI and SDI Cameras /cgi-bin/param.cgi Insufficient Authentication
PTZOptics PT30X-SDI/NDI-xx before firmware 6.3.40 is vulnerable to an insufficient authentication issue. The camera does not properly enforce authentication to /cgi-bin/param.cgi when requests are sent without an HTTP Authorization header. The result is a rem…
KEV Nov 4, 2024 -
Critical 9.3
Expedition: Missing Authentication Leads to Admin Account Takeover
Missing authentication for a critical function in Palo Alto Networks Expedition can lead to an Expedition admin account takeover for attackers with network access to Expedition. Note: Expedition is a tool aiding in configuration migration, tuning, and enrichm…
KEV Nov 7, 2024 -
Medium 5.3CVE-2023-36851 Exploited
Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files
A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to webauth_operation.php th…
KEV Nov 13, 2023 -
Medium 5.3
Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary files
A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to user.php that doesn't re…
KEV Nov 13, 2023 -
Medium 5.3
Junos OS: EX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary files
A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to installAppPackage.php tha…
KEV Nov 13, 2023 -
Critical 9.8
Array Networks Array AG Series and vxAG (9.4.0.481 and earlier) allow remote code execution. An attacker can browse the…
KEV Nov 25, 2024 -
High 7.5
Vulnerability in Veeam Backup & Replication component allows encrypted credentials stored in the configuration database…
KEV Aug 22, 2023 -
Critical 9.8
TerraMaster NAS 4.2.29 and earlier allows remote attackers to discover the administrative password by sending "User-Age…
KEV Feb 10, 2023 -
High 7.5
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions t…
KEV May 1, 2023 -
Critical 9.8
Vulnerability in the Oracle Web Applications Desktop Integrator product of Oracle E-Business Suite (component: Upload).…
KEV Feb 2, 2023 -
High 8.1
Windows LSA Spoofing Vulnerability
Windows LSA Spoofing Vulnerability
KEV Jul 1, 2022 -
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 -
Critical 9.8CVE-2022-26501 Exploited · Ransomware
Veeam Backup & Replication 10.x and 11.x has Incorrect Access Control (issue 1 of 2).
KEV Dec 13, 2022 -
Critical 9.8
The TP-240 (aka tp240dvr) component in Mitel MiCollab before 9.4 SP1 FP1 and MiVoice Business Express through 8.1 allow…
KEV Mar 25, 2022 -
Critical 9.8
Vulnerability in the Oracle Access Manager product of Oracle Fusion Middleware (component: OpenSSO Agent). Supported ve…
KEV Nov 28, 2022 -
Critical 9.8
NUUO NVRmini2 through 3.11 allows an unauthenticated attacker to upload an encrypted TAR archive, which can be abused t…
KEV Dec 18, 2024 -
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
Zoho ManageEngine ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs …
KEV Dec 1, 2021