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CWE-284 (访问控制不恰当) — Vulnerability Class 2612

2612 vulnerabilities classified as CWE-284 (访问控制不恰当). AI Chinese analysis included.

CWE-284 represents a critical security weakness where software fails to properly restrict access to sensitive resources, allowing unauthorized actors to interact with data or functions they should not reach. This flaw typically arises when developers neglect to implement robust authentication or authorization checks, enabling attackers to bypass security controls through direct URL manipulation, token forgery, or privilege escalation techniques. Exploitation often leads to severe consequences, including data breaches, unauthorized system modifications, or complete service disruption. To mitigate this risk, developers must enforce strict access control policies at every layer of the application architecture. This involves implementing comprehensive identity verification, applying the principle of least privilege, and rigorously validating user permissions before granting access to any protected resource, ensuring that only authenticated and authorized users can perform specific actions.

MITRE CWE Description
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Access control involves the use of several protection mechanisms such as: Authentication (proving the identity of an actor) Authorization (ensuring that a given actor can access a resource), and Accountability (tracking of activities that were performed) When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: Specification: incorrect privileges, permissions, ownership, etc. are explicitly specified for either the user or the resource (for example, setting a password file to be world-writable, or giving administrator capabilities to a guest user). This action could be performed by the program or the administrator. Enforcement: the mechanism contains errors that prevent it from properly enforcing the specified access control requirements (e.g., allowing the user to specify their own privileges, or allowing a syntactically-incorrect ACL to produce insecure settings). This problem occurs within the program itself, in that it does not actually enforce the intended security policy that the administrator specifies.
Common Consequences (1)
Other Varies by Context
Mitigations (2)
Architecture and Design, Operation Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Architecture and Design Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separatio…
Examples (2)
This code temporarily raises the program's privileges to allow creation of a new user folder.
def makeNewUserDir(username): if invalidUsername(username): #avoid CWE-22 and CWE-78 print('Usernames cannot contain invalid characters') return False try: raisePrivileges() os.mkdir('/home/' + username) lowerPrivileges() except OSError: print('Unable to create new user directory for user:' + username) return False return True
Bad · Python
This function runs an arbitrary SQL query on a given database, returning the result of the query.
function runEmployeeQuery($dbName, $name){ mysql_select_db($dbName,$globalDbHandle) or die("Could not open Database".$dbName); //Use a prepared statement to avoid CWE-89 $preparedStatement = $globalDbHandle->prepare('SELECT * FROM employees WHERE name = :name'); $preparedStatement->execute(array(':name' => $name)); return $preparedStatement->fetchAll(); } /.../ $employeeRecord = runEmployeeQuery('EmployeeDB',$_GET['EmployeeName']);
Bad · PHP
CVE ID Title CVSS Severity Published
CVE-2026-40966 VectorStoreChatMemoryAdvisor conversation scoping can lead to cross-tenant memory exfiltration — Spring AI 5.9 Medium 2026-04-28
CVE-2026-33318 Actual has Privilege Escalation via 'change-password' Endpoint on OpenID-Migrated Servers — actual 8.8 High 2026-04-24
CVE-2026-29197 Rocket.Chat 访问控制错误漏洞 — Rocket.Chat 4.3AI Medium AI 2026-04-23
CVE-2026-24303 Microsoft Partner Center Elevation of Privilege Vulnerability — Microsoft Partner Center 9.6 Critical 2026-04-23
CVE-2026-41277 Flowise: Mass Assignment in DocumentStore Create Endpoint Leads to Cross-Workspace Object Takeover (IDOR) — Flowise 8.8AI High AI 2026-04-23
CVE-2026-41270 Flowise: SSRF Protection Bypass via Unprotected Built-in HTTP Modules in Custom Function Sandbox — Flowise 7.1 High 2026-04-23
CVE-2026-41243 OpenLearn's pending forum posts remain publicly readable by direct ID when moderation mode is enabled — OpenLearn 4.3AI Medium AI 2026-04-23
CVE-2026-41166 OpenRemote has Improper Access Control via updateUserRealmRoles function — openremote 7.0 High 2026-04-22
CVE-2026-40889 Frappe HR has Improper Access Control on Files — hrms 6.5 Medium 2026-04-21
CVE-2026-40888 Frappe HR vulnerable to Improper Access Control — hrms 6.5AI Medium AI 2026-04-21
CVE-2026-40874 mailcow: dockerized missing authorization on Forwarding Hosts delete action — mailcow-dockerized 5.4AI Medium AI 2026-04-21
CVE-2026-40867 Horilla: Unauthorized Helpdesk Attachment Access via Attachment ID Manipulation — horilla 6.5AI Medium AI 2026-04-21
CVE-2026-40866 Horilla: Unauthorized Document Overwrite via File Upload Endpoint — horilla 4.3AI Medium AI 2026-04-21
CVE-2026-40865 Horilla: Insecure Direct Object Reference at `/employee/view-file/<int:id> — horilla 6.5AI Medium AI 2026-04-21
CVE-2026-40569 FreeScout's Mass Assignment in Mailbox Connection Settings Enables Silent Email Exfiltration — freescout 9.0 Critical 2026-04-21
CVE-2026-33031 Nginx-UI: Disabled users retain full API access through previously issued bearer tokens — nginx-ui 8.8AI High AI 2026-04-20
CVE-2026-40474 wger has Broken Access Control in the Global Gym Configuration Update Endpoint — wger 7.6 High 2026-04-17
CVE-2026-40304 zrok's broken ownership check in DELETE /api/v2/unaccess allows non-admin to delete global frontend records — zrok 5.3 Medium 2026-04-17
CVE-2026-35402 mcp-neo4j-cypher: SSRF and Data Modification via read_only Mode Bypass Through CALL Procedures — mcp-neo4j 9.8AI Critical AI 2026-04-17
CVE-2026-31843 goodoneuz/pay-uz Unauthenticated PHP File Overwrite via /payment/api/editable/update Leading to Remote Code Execution — pay-uz 9.8 Critical 2026-04-16
CVE-2026-33212 Weblate: Improper access control for pending tasks in API — weblate 3.1 Low 2026-04-15
CVE-2026-20203 Improper Access Control in Data Model Acceleration in Splunk Enterprise — Splunk Enterprise 4.3 Medium 2026-04-15
CVE-2026-32214 Universal Plug and Play (upnp.dll) Information Disclosure Vulnerability — Windows 10 Version 1607 5.5 Medium 2026-04-14
CVE-2026-33103 Microsoft Dynamics 365 (On-Premises) Information Disclosure Vulnerability — Microsoft Dynamics 365 (on-premises) version 9.0 5.5 Medium 2026-04-14
CVE-2026-27914 Microsoft Management Console Elevation of Privilege Vulnerability — Windows 10 Version 1607 7.8 High 2026-04-14
CVE-2026-32220 UEFI Secure Boot Security Feature Bypass Vulnerability — Windows 11 Version 24H2 4.4 Medium 2026-04-14
CVE-2026-26183 Remote Access Management service/API (RPC server) Elevation of Privilege Vulnerability — Windows Server 2012 7.8 High 2026-04-14
CVE-2026-22566 Ubiquiti UniFi Play PowerAmp和Ubiquiti UniFi Play Audio Port 安全漏洞 — UniFi Play PowerAmp 7.5 High 2026-04-13
CVE-2026-22564 Ubiquiti UniFi Play PowerAmp和Ubiquiti UniFi Play Audio Port 安全漏洞 — UniFi Play PowerAmp 9.8 Critical 2026-04-13
CVE-2026-6201 CodeAstro Online Job Portal Delete Job Posting job-delete.php access control — Online Job Portal 5.4 Medium 2026-04-13

Vulnerabilities classified as CWE-284 (访问控制不恰当) represent 2612 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.