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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-2026-45154 Nextcloud: Improper Access Control in Collectives — security-advisories 2.6 Low 2026-06-01
CVE-2026-45264 Nextcloud: ACL Rename Permission Bypass in Team Folders Allows Unauthorized File Renames — security-advisories 4.3 Medium 2026-06-01
CVE-2026-10255 SourceCodester Pharmacy Sales and Inventory System ShowForm.php sell_statement access control — Pharmacy Sales and Inventory System 5.3 Medium 2026-06-01
CVE-2026-10152 TaleLin lin-cms-spring-boot book Endpoint BookController.java access control — lin-cms-spring-boot 6.3 Medium 2026-05-30
CVE-2026-45707 n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant headers are absent or incomplete — n8n-mcp 8.1 High 2026-05-29
CVE-2026-49198 Predator Connect W6x: MQTT Broker Access Control — Predator Connect W6x - - 2026-05-29
CVE-2026-45296 OpenReplay: Cross-tenant information disclosure in app_apikey projectKey routes via missing tenant binding — openreplay 7.7 High 2026-05-28
CVE-2026-41160 EspoCRM: Broken Access Control / IDOR in Note Pinning API allows unauthorized modification of notes — espocrm 4.3 Medium 2026-05-28
CVE-2026-32995 Rocket.Chat 安全漏洞 — Rocket.Chat - - 2026-05-28
CVE-2026-46416 Microsoft UFO shared WebSocket handler state causes cross-client response hijacking — UFO 6.3 Medium 2026-05-27
CVE-2026-47269 pam_usb: deny_remote feature incorrectly classifies IPv4-mapped IPv6 remote connections as local — pam_usb 7.4 High 2026-05-27
CVE-2026-1933 Samba: missing access check on reparse point operations — Red Hat Enterprise Linux 10 7.1 High 2026-05-27
CVE-2026-48906 Extension - tassos.gr - Arbitrary File Deletion in Novarain/Tassos Framework < 6.1.0 for Joomla — Novarain/Tassos Framework (plg_system_nrframework) - - 2026-05-27
CVE-2026-49002 Broken Access Control Vulnerabily in ZTE ZXUniPOS NDS-LTE product — ZXUniPOS NDS-LTE 9.1 Critical 2026-05-27
CVE-2026-41704 Compromised VM can make arbitrary blobstore deletes — BOSH Director 5.0 Medium 2026-05-27
CVE-2026-9604 JeecgBoot AiragModelController access control — JeecgBoot 4.3 Medium 2026-05-26
CVE-2026-9581 JeecgBoot add access control — JeecgBoot 6.3 Medium 2026-05-26
CVE-2026-9580 JeecgBoot selectDepart LoginController.selectDepart access control — JeecgBoot 7.3 High 2026-05-26
CVE-2026-9579 JeecgBoot SysUser userEdit user.getUsername access control — JeecgBoot 6.3 Medium 2026-05-26
CVE-2026-44730 OpenCTI: Privilege escalation via graphQL API abusable by organization admins, due to incorrect ACL on userEdit relationAdd — opencti 7.2 High 2026-05-26
CVE-2026-48899 Joomla! Core - [20260515] - Incorrect Access Control in sample data plugins — Joomla! CMS - - 2026-05-26
CVE-2026-48900 Joomla! Core - [20260516] - Incorrect Access Control in com_scheduler — Joomla! CMS - - 2026-05-26
CVE-2026-35223 Joomla! Core - [20260508] - Improper access check in com_config webservice endpoints — Joomla! CMS - - 2026-05-26
CVE-2026-48904 Joomla! Core - [20260514] - Privilege escalation through com_users webservice endpoints — Joomla! CMS - - 2026-05-26
CVE-2026-48898 Joomla! Core - [20260513] - Privilege escalation through com_users batch task — Joomla! CMS - - 2026-05-26
CVE-2026-9562 sambitraj STUDENT-MANAGEMENT-SYSTEM Dashboard access control — STUDENT-MANAGEMENT-SYSTEM 7.3 High 2026-05-26
CVE-2026-43934 e107: Broken Access Control in e107 comment edit allows cross-user comment modification — e107 6.5 Medium 2026-05-26
CVE-2026-9495 @koa/router 安全漏洞 — @koa/router 7.3 High 2026-05-26
CVE-2026-9517 hemant6488 CodeIgniter-StudentManagementSystem Student Management addStudentView access control — CodeIgniter-StudentManagementSystem 7.3 High 2026-05-26
CVE-2026-9412 SourceCodester Indian Invoicing System Backend Endpoint access control — Indian Invoicing System 6.3 Medium 2026-05-25

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.