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CWE-306 (关键功能的认证机制缺失) — Vulnerability Class 1920

1920 vulnerabilities classified as CWE-306 (关键功能的认证机制缺失). AI Chinese analysis included.

CWE-306 represents a critical authentication weakness where software fails to verify user identity before executing sensitive operations or consuming substantial resources. Attackers typically exploit this vulnerability by directly invoking administrative endpoints, initiating high-cost processes, or accessing restricted data without valid credentials, effectively bypassing security controls. This oversight allows unauthorized users to perform actions intended only for authenticated individuals, leading to privilege escalation, data breaches, or denial of service through resource exhaustion. To mitigate this risk, developers must implement robust access control mechanisms that strictly enforce authentication checks on all critical functions. This involves integrating secure session management, validating tokens for every request, and applying the principle of least privilege to ensure that only verified users with appropriate permissions can trigger sensitive operations or consume significant system resources.

MITRE CWE Description
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Common Consequences (1)
Access Control, Other Gain Privileges or Assume Identity, Varies by Context
Exposing critical functionality essentially provides an attacker with the privilege level of that functionality. The consequences will depend on the associated functionality, but they can range from reading or modifying sensitive data, accessing administrative or other privileged functionality, or p…
Mitigations (5)
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 access…
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.
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…
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].
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].
Examples (2)
In the following Java example the method createBankAccount is used to create a BankAccount object for a bank management application.
public BankAccount createBankAccount(String accountNumber, String accountType, String accountName, String accountSSN, double balance) { BankAccount account = new BankAccount(); account.setAccountNumber(accountNumber); account.setAccountType(accountType); account.setAccountOwnerName(accountName); account.setAccountOwnerSSN(accountSSN); account.setBalance(balance); return account; }
Bad · Java
private boolean isUserAuthentic = false; // authenticate user, // if user is authenticated then set variable to true // otherwise set variable to false public boolean authenticateUser(String username, String password) { ... } public BankAccount createNewBankAccount(String accountNumber, String accountType, String accountName, String accountSSN, double balance) { BankAccount account = null; if (isUserAuthentic) { account = new BankAccount(); account.setAccountNumber(accountNumber); account.setAccountType(accountType); account.setAccountOwnerName(accountName); account.setAccountOwnerSSN(accountS
Good · Java
In 2022, the OT:ICEFALL study examined products by 10 different Operational Technology (OT) vendors. The researchers reported 56 vulnerabilities and said that the products were "insecure by design" [REF-1283]. If exploited, these vulnerabilities often allowed adversaries to change how the products operated, ranging from denial of service to changing the code that the products executed. Since these…
CVE ID Title CVSS Severity Published
CVE-2026-44775 Kavita: No authentication at /api/Reader/image — Kavita - - 2026-05-26
CVE-2026-9371 ItzCrazyKns Vane API route.ts missing authentication — Vane 5.6 Medium 2026-05-24
CVE-2026-9152 Unauthenticated SOAP Endpoint in Altium 365 SearchService Allows Cross-Tenant Data Exfiltration and Index Destruction — Altium 365 - - 2026-05-21
CVE-2026-9141 Taiko AG1000-01A Rev 7.3/8 Authentication Bypass via Web Interface — AG1000-01A SMS Alert Gateway 9.8 Critical 2026-05-20
CVE-2026-20223 Cisco Secure Workload Unauthorized API Access Vulnerability — Cisco Secure Workload 10.0 Critical 2026-05-20
CVE-2026-8602 Missing authentication for critical function in ScadaBR — ScadaBR - - 2026-05-19
CVE-2018-25335 WordPress Plugin Peugeot Music 1.0 Arbitrary File Upload — Peugeot Music 9.8 Critical 2026-05-17
CVE-2018-25332 GitBucket 4.23.1 Unauthenticated Remote Code Execution — GitBucket 9.8 Critical 2026-05-17
CVE-2026-8737 Sanluan PublicCMS Trade Address Query TradeAddressListDirective.java execute missing authentication — PublicCMS 5.3 Medium 2026-05-17
CVE-2026-45397 Open WebUI: Unauthenticated RAG Configuration Disclosure — open-webui 5.3 Medium 2026-05-15
CVE-2026-45248 Hedera Guardian Authentication Bypass Information Disclosure — guardian 5.3 Medium 2026-05-14
CVE-2026-44592 Gradient: Unauthenticated worker on /proto → arbitrary NAR write / cache poisoning — gradient 9.4 Critical 2026-05-14
CVE-2026-42283 DevSpace UI Server WebSocket CheckOrigin does not validate source — devspace 7.7 High 2026-05-14
CVE-2025-62619 AMD Processors 访问控制错误漏洞 — AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics - - 2026-05-14
CVE-2026-0247 Prisma Access Agent Endpoint DLP: Authorization Bypass Vulnerabilities — Prisma Access Agent - - 2026-05-13
CVE-2026-5029 RCE in Code Runner MCP Server — Code Runner MCP Server - - 2026-05-12
CVE-2026-22924 Siemens SIMATIC CN 4100 访问控制错误漏洞 — SIMATIC CN 4100 9.1 Critical 2026-05-12
CVE-2026-43881 WWBN AVideo: Unauthenticated User Enumeration in `objects/users.json.php` via `isCompany` Parameter Flips `$ignoreAdmin = true` and Defeats Admin-Only Listing Guard — AVideo 5.3 Medium 2026-05-11
CVE-2026-42864 FireFighter: Unauthenticated SSRF in Raid jira_bot endpoint allows IAM credential theft — firefighter-incident 9.9 Critical 2026-05-11
CVE-2026-42856 Network-AI: Missing authentication on MCP HTTP endpoint allows unauthenticated privileged tool calls — Network-AI - - 2026-05-11
CVE-2026-44413 JetBrains TeamCity 访问控制错误漏洞 — TeamCity 8.2 High 2026-05-11
CVE-2021-47940 WordPress Download From Files 1.48 Arbitrary File Upload — Download From Files 9.8 Critical 2026-05-10
CVE-2021-47936 OpenCATS 0.9.4 Remote Code Execution via Resume Upload — OpenCATS 9.8 Critical 2026-05-10
CVE-2021-47933 WordPress MStore API 2.0.6 Arbitrary File Upload — MStore API 9.8 Critical 2026-05-10
CVE-2026-8185 UGREEN CM933 Administrative missing authentication — CM933 6.3 Medium 2026-05-09
CVE-2026-42302 FastGPT: Unauthenticated Remote Code Execution (RCE) via code-server Misconfiguration in agent-sandbox — FastGPT 9.8 Critical 2026-05-08
CVE-2026-42176 Scoold: Persistent Admin Takeover by Overwriting the admins Configuration Setting via Forged JWT (missing `jti` validation) — scoold 6.7 Medium 2026-05-08
CVE-2026-44338 PraisonAI ships and generates a legacy API server with authentication disabled by default, allowing unauthenticated workflow execution — PraisonAI 7.3 High 2026-05-08
CVE-2026-6736 Authentication bypass vulnerability in GitHub Enterprise Server allowed creation of local user accounts bypassing the configured external identity provider — Enterprise Server 6.5AI Medium AI 2026-05-07
CVE-2026-7415 Open MQTT orchestration without read/write ACLs in Yarbo robot firmware — Firmware 9.8 Critical 2026-05-07

Vulnerabilities classified as CWE-306 (关键功能的认证机制缺失) represent 1920 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.