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
1,261 results · Clear filters · Feed
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High 7.5
FA-50 all versions miss authentication for some configuration. An attacker with access to the vessel's internal network…
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High 8.8
Missing Authentication Allows Unauthorized Creation of Crypto Groups in RansomLook
RansomLook contains a missing authentication vulnerability in the /admin/crypto/group/new endpoint. While the endpoint provides an administrative function for creating new crypto group entries, it was not protected by the application's authentication mechanis…
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High 7.1
Missing Authentication for Critical Function in KAON PG5298
Firmware in KAON PG5298A and PG5298B routers allow an unauthenticated user to query a specific endpoint and acquire sensitive information such as a password to the administrative portal. This vulnerability has been fixed in firmware version: 3.0.82 for PG52…
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High 8.5CVE-2026-78306 Public exploit
DJI Drone Bluetooth Interface Unauthenticated DUML Command Execution
DJI drones expose an unauthenticated DUML command interface over Bluetooth that allows an attacker within Bluetooth range to modify Wi-Fi configuration parameters, including the SSID, PSK, MAC address, regulatory country code, and wireless channel. An attacke…
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High 8.7
DJI Drone HTTP Media Server Allows Unauthenticated Access to Stored Media
The HTTP media server running on DJI drones serves stored photos and videos through the `/v2` endpoint without authenticating the requesting client. Filenames follow a predictable pattern, allowing an attacker who joins the drone's internal network to enumera…
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High 8.8
AVideo Authentication Bypass via Unkeyed Video Hash Disclosure
AVideo through commit 9c39d8c8 contains an authentication bypass vulnerability where deduplicateByEncoderQueueId() returns video_id_hash credentials for any video by encoder_queue_id without ownership verification, and useVideoHashOrLogin() converts this hash…
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High 8.3
Arc Enterprise cluster replication accepts unauthenticated MsgReplicateSync messages, enabling cluster-wide data injection from any TLS-trusted peer
Arc is an open, SQL-native time-series database for telemetry. Prior to version 26.06.1, Arc Enterprise's cluster replication receiver at `internal/cluster/replication/receiver.go` validates only the wire-format envelope (length, opcode) of inbound messages. …
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High 8.8
Arc: Unauthenticated access to Go debug pprof endpoints leaks runtime state and enables CPU-burn DoS
Arc is an open, SQL-native time-series database for telemetry. Versions prior to 26.06.1 register Go's `net/http/pprof` handlers at `/debug/pprof/*` via `app.Use(pprof.New())` in `internal/api/server.go`, and `/debug/pprof` is added to `PublicPrefixes` in `cm…
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High 8.6
Combodo iTop: Authentication bypass in exec.php allows PHP file execution
Combodo iTop is a web based IT service management tool. Prior to 3.2.3, authentication bypass allows unauthenticated remote attackers to execute arbitrary PHP files from the env-production directory on a new iTop instance in the production environment. This i…
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High 7.5
Combodo iTop: Insecured access to uploaded images via sniffed url
Combodo iTop is a web based IT service management tool. Prior to 3.2.3, unauthenticated users can access uploaded sensitive via sniffed url. This issue has been fixed in version 3.2.3.
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High 8.8
Datiphy Data Management Center - Missing Authentication for Critical Function
Missing authentication for a critical function in the upload API endpoint of Datiphy Data Management Center from v8.3.0 through v8.5.1 allows an unauthenticated remote attacker to upload arbitrary files to the server's configured upload directory.
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High 7.5
Mailu missing authentication on PATCH /api/v1/token/<id>, which allows unauthenticated removal of IP restrictions
Mailu is a mail server as a set of Docker images. Prior to version 2024.06.52, a missing authorization check in the Mailu admin REST API allows any unauthenticated attacker to remove any potential IP restriction or update the comment field from any existing u…
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High 7.5
Frauscher Sensortechnik: FDS102 for FAdC/FAdCi R2 is offering files with sensitive information for download without requiring authentication
An unauthenticated remote attacker can retrieve sensible files from the FDS Web server, such as the backup archive at /FdsBackup.zip and additional files under /downloads/*, directly over HTTP without a valid session. These files disclose detailed railway sig…
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High 7.5
The Library Corporation LS2 Admin v5.7 to v5.8.0 was discovered to contain an information disclosure vulnerability.
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High 7.5
Unauthenticated Information Disclosure through an Edge Processor Service Endpoint in Splunk Enterprise
In Splunk Enterprise 10.4 versions below 10.4.2, an unauthenticated user could retrieve the information contained in Edge Processor pipeline configurations through a Representational State Transfer (REST) API endpoint when Edge Processor is turned on. The vul…
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High 7.5
Unauthenticated Registration POST Endpoint Permits Admin Email Overwrite and Outbound Relay Abuse in Langflow
IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to overwrite administrator email information and abuse the server as an outbound relay due to missing authentication for the registration endpoint.
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High 8.8
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High 8.1
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High 7.5
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High 8.8
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High 7.4
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