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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-2026-1895 WeKan Attachment Storage lists.js applyWipLimit ListWIPBleed access control — WeKan 6.3 Medium 2026-02-04
CVE-2026-25519 OpenSlides has incorrect access control vulnerability in authentication service — OpenSlides 8.1 High 2026-02-04
CVE-2026-24668 Open eClass Broken Access Control Allows Students to Add Content to Course Units — openeclass 6.5 Medium 2026-02-03
CVE-2026-24670 Open eClass Has Broken Access Control in Course Units Module Allows Students to Create Units — openeclass 6.5 Medium 2026-02-03
CVE-2020-37116 GUnet OpenEclass 1.7.3 E-learning platform - phpMyAdmin Remote Access — GUnet OpenEclass 8.8 High 2026-02-03
CVE-2026-1117 Improper Access Control in parisneo/lollms — parisneo/lollms 8.1AI High AI 2026-02-02
CVE-2026-24904 TrustTunnel has `client_random_prefix` rule bypass via fragmented or partial TLS ClientHello — TrustTunnel 5.3 Medium 2026-01-29
CVE-2025-7016 Improper Access Control in Akinsoft's QR Menu — QR Menu 8.0 High 2026-01-29
CVE-2025-46691 Dell PremierColor Panel Driver 访问控制错误漏洞 — PremierColor 7.8 High 2026-01-28
CVE-2026-0844 Simple User Registration <= 6.7 - Authenticated (Subscriber+) Privilege Escalation via profile_save_field — Simple User Registration 8.8 High 2026-01-28
CVE-2025-67645 OpenEMR Vulnerable to Broken Access Control in Profile Edit Endpoint — openemr 8.8 High 2026-01-27
CVE-2026-24740 Dozzle Agent Label-Based Access Control Bypass Allows Unauthorized Container Shell Access — dozzle 8.1AI High AI 2026-01-27
CVE-2026-1411 Beetel 777VR1 UART access control — 777VR1 6.1 Medium 2026-01-26
CVE-2026-24420 phpMyFAQ: Attachment download allowed without dlattachment right (broken access control) — phpMyFAQ 6.5 Medium 2026-01-24
CVE-2026-24304 Azure Resource Manager Elevation of Privilege Vulnerability — Azure Resource Manager 9.9 Critical 2026-01-23
CVE-2026-24306 Azure Front Door Elevation of Privilege Vulnerability — Azure Front Door 9.8 Critical 2026-01-22
CVE-2026-20897 Gitea Git LFS Lock Deletion Broken Access Control (Cross-Repo IDOR) — Gitea Open Source Git Server 6.5AI Medium AI 2026-01-22
CVE-2026-20904 Gitea: Broken access control in OpenID visibility toggle enables cross-user visibility changes — Gitea Open Source Git Server 4.3AI Medium AI 2026-01-22
CVE-2026-20912 Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure — Gitea Open Source Git Server 7.5AI High AI 2026-01-22
CVE-2026-20888 Gitea Pull Requests Auto-Merge: Read-Only Users Can Cancel Scheduled Auto-Merge via Web Endpoint (Authorization Bypass) — Gitea Open Source Git Server 4.3AI Medium AI 2026-01-22
CVE-2026-20883 Gitea Stopwatch API Missing Authorization Check Leads to Post-Revocation Information Disclosure — Gitea Open Source Git Server 5.3AI Medium AI 2026-01-22
CVE-2026-20736 Gitea Web Attachment Deletion: Cross-Repository Unauthorized Deletion via Missing Repo Ownership Check — Gitea Open Source Git Server 6.5AI Medium AI 2026-01-22
CVE-2026-20750 Gitea Organization Projects Cross-Organization Authorization Bypass via Project ID (IDOR) — Gitea Open Source Git Server 6.5AI Medium AI 2026-01-22
CVE-2026-0798 Gitea Release Email Notifications Leak Private Repository Release Details After Access Revocation — Gitea Open Source Git Server 3.5AI Low AI 2026-01-22
CVE-2026-24039 Horilla's Improper Access Control Allows Employees to Auto-Approve Documents — horilla 4.3 Medium 2026-01-22
CVE-2026-24036 Horilla Exposes Unpublished Job Disclosures through Unauthenticated API — horilla 5.3 Medium 2026-01-22
CVE-2026-24055 Langfuse Slack OAuth Installation Endpoint Lacks Authentication, Enabling Arbitrary Project Linking — langfuse 6.5AI Medium AI 2026-01-22
CVE-2026-24035 Horilla has Improper Access Control Issue that Allows Unauthorized Document Upload on Behalf of Another Employee — horilla 4.3 Medium 2026-01-22
CVE-2025-14083 Keycloak-server: keycloak: improper access control in admin rest api leads to information disclosure — Red Hat build of Keycloak 26.4 2.7 Low 2026-01-21
CVE-2025-14977 Dokan: AI Powered WooCommerce Multivendor Marketplace Solution – Build Your Own Amazon, eBay, Etsy <= 4.2.4 - Insecure Direct Object Reference to PayPal Account Takeover and Sensitive Information Disclosure — Dokan: AI Powered WooCommerce Multivendor Marketplace Solution – Build Your Own Amazon, eBay, Etsy 8.1 High 2026-01-20

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.