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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-2026-55536 Browser Server WebSocket origin validation bypass via unanchored regex (patch bypass of CVE-2026-40289 / GHSA-8x8f-54wf-vv92) — PraisonAI 9.1 Critical 2026-08-25
CVE-2026-77997 Joomla Extension - yootheme.com - Authenticated, privileged information disclosure about site modules YOOtheme Pro 1.0.0-5.0.40 — YOOtheme Pro extension for Joomla 5.1 Medium 2026-08-25
CVE-2026-61419 Dell ThinOS 10 权限许可和访问控制问题漏洞 — ThinOS 10 7.8 High 2026-08-24
CVE-2026-76603 Joomla Extension - fabrikar.com - Unauthenticated row disclosure via form.inlineedit in Fabrik < 4.7.2 — Fabrik extension for Joomla 6.9 Medium 2026-08-22
CVE-2026-76597 Joomla Extension - fabrikar.com - Unauthenticated arbitrary file upload to web root via list email plugin in Fabrik < 4.7.2 — Fabrik extension for Joomla 8.7 High 2026-08-22
CVE-2026-76598 Joomla Extension - fabrikar.com - Unauthenticated arbitrary directory listing via onAjax_getFolders in Fabrik < 4.7.2 — Fabrik extension for Joomla 8.7 High 2026-08-22
CVE-2026-76596 Joomla Extension - fabrikar.com - Unauthenticated table truncation via list.doempty in Fabrik < 4.7.2 — Fabrik extension for Joomla 8.7 High 2026-08-22
CVE-2026-76600 Joomla Extension - fabrikar.com - Unauthenticated deletion of any comment in Fabrik < 4.7.2 — Fabrik extension for Joomla 6.9 Medium 2026-08-22
CVE-2026-76607 Joomla Extension - fabrikar.com - Missing ACL check in download element in Fabrik < 4.7.2 — Fabrik extension for Joomla 10.0 Critical 2026-08-22
CVE-2026-76609 Joomla Extension - fabrikar.com - Unauthenticated modification of any comment in Fabrik < 4.7.2 — Fabrik extension for Joomla 6.9 Medium 2026-08-22
CVE-2026-76608 Joomla Extension - fabrikar.com - Unauthenticated disclosure of any commenter's email address in Fabrik < 4.7.2 — Fabrik extension for Joomla 6.9 Medium 2026-08-22
CVE-2026-76599 Joomla Extension - fabrikar.com - Unauthenticated database table list and table-prefix disclosure in Fabrik < 4.7.2 — Fabrik extension for Joomla 8.7 High 2026-08-22
CVE-2026-76601 Joomla Extension - fabrikar.com - Unauthenticated row reordering in Fabrik < 4.7.2 — Fabrik extension for Joomla 6.9 Medium 2026-08-22
CVE-2026-65915 NLTK before 3.10.0 Arbitrary File Read via FileSystemPathPointer — nltk 6.5 Medium 2026-08-22
CVE-2026-66916 Joomla Extension - joomgalleryfriends.net - Password-Protected Category Bypass via JSON Format in JoomGallery < 4.4.0 — JoomGallery extension for Joomla 6.9 Medium 2026-08-22
CVE-2026-55622 Incus has a project restriction bypass in instance copy across projects — incus 7.7 High 2026-08-21
CVE-2026-55621 Incus has a project restriction bypass for custom volume copy across projects — incus 7.7 High 2026-08-21
CVE-2026-62440 Apache CloudStack: Improper access control in Kubernetes Service (CKS) cluster manipulation — Apache CloudStack - - 2026-08-21
CVE-2026-66797 Apache CloudStack: Unauthorised comment creation and disclosure — Apache CloudStack - - 2026-08-21
CVE-2026-66309 Azure SQL Database Elevation of Privilege Vulnerability — Azure SQL Database 9.1 Critical 2026-08-20
CVE-2026-76345 Remote Code Execution (RCE) through the REST API in Splunk Enterprise — Splunk Enterprise 6.0 Medium 2026-08-19
CVE-2026-76313 Remote Code Execution (RCE) through the REST API in Splunk Enterprise — Splunk Enterprise 8.8 High 2026-08-19
CVE-2026-76312 Improper Access Control through Embedded Reports in Splunk Enterprise — Splunk Enterprise 9.4 Critical 2026-08-19
CVE-2026-76311 Improper Access Control in Embedded Report Dispatch Archives in Splunk Enterprise — Splunk Enterprise 9.4 Critical 2026-08-19
CVE-2026-76310 Improper Access Control through Embedded Report REST API Requests in Splunk Enterprise — Splunk Enterprise 9.4 Critical 2026-08-19
CVE-2026-20315 Cisco Secure Workload Software Security Hardening Release August 2026 - Improper Access Control Vulnerabilities — Cisco Secure Workload 10.0 Critical 2026-08-19
CVE-2026-75950 Joomla Extension - cmsjunkie.com - Unauthenticated listing ownership takeover in J-BusinessDirectory < 6.2.3 — J-BusinessDirectory extension for Joomla 6.9 Medium 2026-08-19
CVE-2026-67442 FUXA Business Logic Flaw: Role Deletion Without User Assignment Cleanup — FUXA 2.0 Low 2026-08-18
CVE-2026-63641 MagicMirror Socket.IO module namespaces bypass configured IP whitelist and allow unauthenticated server-side actions — MagicMirror 2.3 Low 2026-08-18
CVE-2026-54730 authentik: Authentication Flow Bypass via Unguarded challenge_valid() in AuthenticatorEndpointGDTCStage and GoogleChromeStageView — authentik 8.6 High 2026-08-18

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.