Common Weakness Enumeration
CWE-306
AllowedMissing Authentication for Critical Function
Abstraction: Base · Status: Draft
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
3609 vulnerabilities reference this CWE, most recent first.
CVE-2021-22652 (GCVE-0-2021-22652)
Vulnerability from cvelistv5 – Published: 2021-02-11 16:06 – Updated: 2024-08-03 18:51
VLAI
EPSS
VEX
Summary
Access to the Advantech iView versions prior to v5.7.03.6112 configuration are missing authentication, which may allow an unauthorized attacker to change the configuration and obtain code execution.
Severity
No CVSS data available.
CWE
- CWE-306 - MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://us-cert.cisa.gov/ics/advisories/icsa-21-040-02 | x_refsource_MISC |
| http://packetstormsecurity.com/files/161937/Advan… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Advantech iView |
Affected:
iView versions prior to v5.7.03.6112
|
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CVE-2021-22279 (GCVE-0-2021-22279)
Vulnerability from cvelistv5 – Published: 2021-12-13 15:48 – Updated: 2024-09-16 17:38
VLAI
EPSS
VEX
Title
OmniCore RobotWare Missing Authentication Vulnerability
Summary
A Missing Authentication vulnerability in RobotWare for the OmniCore robot controller allows an attacker to read and modify files on the robot controller if the attacker has access to the Connected Services Gateway Ethernet port.
Severity
9.8 (Critical)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://search.abb.com/library/Download.aspx?Docu… | x_refsource_MISC |
Impacted products
Date Public
2021-12-01 00:00
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CVE-2021-21535 (GCVE-0-2021-21535)
Vulnerability from cvelistv5 – Published: 2021-04-30 17:40 – Updated: 2024-09-16 23:35
VLAI
EPSS
VEX
Summary
Dell Hybrid Client versions prior to 1.5 contain a missing authentication for a critical function vulnerability. A local unauthenticated attacker may exploit this vulnerability in order to gain root level access to the system.
Severity
7.4 (High)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.dell.com/support/kbdoc/en-us/00018466… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dell | Dell Hybrid Client (DHC) |
Affected:
unspecified , < 1.5
(custom)
|
Date Public
2021-03-31 00:00
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CVE-2021-20998 (GCVE-0-2021-20998)
Vulnerability from cvelistv5 – Published: 2021-05-13 13:45 – Updated: 2024-09-17 00:51
VLAI
EPSS
VEX
Title
WAGO: Managed Switches: Unauthorized creation of user accounts
Summary
In multiple managed switches by WAGO in different versions without authorization and with specially crafted packets it is possible to create users.
Severity
10 (Critical)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://cert.vde.com/en-us/advisories/vde-2021-013 | x_refsource_CONFIRM |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| WAGO | 0852-0303 |
Affected:
unspecified , ≤ V1.2.3.S0
(custom)
|
|
| WAGO | 0852-1305 |
Affected:
unspecified , ≤ V1.1.7.S0
(custom)
|
|
| WAGO | 0852-1505 |
Affected:
unspecified , ≤ V1.1.6.S0
(custom)
|
|
| WAGO | 0852-1305/000-001 |
Affected:
unspecified , ≤ V1.0.4.S0
(custom)
|
|
| WAGO | 0852-1505/000-001 |
Affected:
unspecified , ≤ V1.0.4.S0
(custom)
|
Date Public
2021-05-05 00:00
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CVE-2021-20990 (GCVE-0-2021-20990)
Vulnerability from cvelistv5 – Published: 2021-04-19 14:05 – Updated: 2024-09-16 16:42
VLAI
EPSS
VEX
Title
Fibaro Home Center Unauthenticated access to shutdown, reboot and reboot to recovery mode
Summary
In Fibaro Home Center 2 and Lite devices with firmware version 4.600 and older an internal management service is accessible on port 8000 and some API endpoints could be accessed without authentication to trigger a shutdown, a reboot or a reboot into recovery mode.
Severity
7.5 (High)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.iot-inspector.com/blog/advisory-fibar… | x_refsource_CONFIRM |
| http://seclists.org/fulldisclosure/2021/Apr/27 | mailing-listx_refsource_FULLDISC |
| http://packetstormsecurity.com/files/162243/Fibar… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Fibar Group S.A | Fibaro Home Center |
Affected:
Home Center 2 , ≤ 4.600
(custom)
Affected: Home Center Lite , ≤ 4.600 (custom) |
Date Public
2021-04-15 00:00
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CVE-2021-20262 (GCVE-0-2021-20262)
Vulnerability from cvelistv5 – Published: 2021-03-09 17:19 – Updated: 2024-08-03 17:37
VLAI
EPSS
VEX
Summary
A flaw was found in Keycloak 12.0.0 where re-authentication does not occur while updating the password. This flaw allows an attacker to take over an account if they can obtain temporary, physical access to a user’s browser. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Severity
No CVSS data available.
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1933639 | x_refsource_MISC |
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CVE-2021-20198 (GCVE-0-2021-20198)
Vulnerability from cvelistv5 – Published: 2021-02-23 17:45 – Updated: 2024-08-03 17:30
VLAI
EPSS
VEX
Summary
A flaw was found in the OpenShift Installer before version v0.9.0-master.0.20210125200451-95101da940b0. During installation of OpenShift Container Platform 4 clusters, bootstrap nodes are provisioned with anonymous authentication enabled on kubelet port 10250. A remote attacker able to reach this port during installation can make unauthenticated `/exec` requests to execute arbitrary commands within running containers. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Severity
No CVSS data available.
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1920764 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | openshift/installer |
Affected:
openshift/installer v0.9.0-master.0.20210125200451-95101da940b0
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CVE-2021-4469 (GCVE-0-2021-4469)
Vulnerability from cvelistv5 – Published: 2025-11-14 22:53 – Updated: 2026-04-07 14:05 Unsupported When Assigned
VLAI
EPSS
VEX
Title
Denver SHO-110 IP Camera Unauthenticated Snapshot Access
Summary
Denver SHO-110 IP cameras expose a secondary HTTP service on TCP port 8001 that provides access to a '/snapshot' endpoint without authentication. While the primary web interface on port 80 enforces authentication, the backdoor service allows any remote attacker to retrieve image snapshots by directly requesting the 'snapshot' endpoint. An attacker can repeatedly collect snapshots and reconstruct the camera stream, compromising the confidentiality of the monitored environment.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/50162 | exploit |
| http://old.denver.eu/products/smart-home-security… | product |
| https://www.vulncheck.com/advisories/denver-sho-1… | third-party-advisory |
Impacted products
Date Public
2021-07-29 00:00
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CVE-2021-4468 (GCVE-0-2021-4468)
Vulnerability from cvelistv5 – Published: 2025-11-14 22:52 – Updated: 2025-11-17 20:37
VLAI
EPSS
VEX
Title
PLANEX CS-QP50F-ING2 Smart Camera Remote Configuration Disclosure
Summary
PLANEX CS-QP50F-ING2 smart cameras expose a configuration backup interface over HTTP that does not require authentication. A remote, unauthenticated attacker can directly retrieve a compressed configuration backup file from the device. The backup contains sensitive configuration information, including credentials, allowing an attacker to obtain administrative access to the camera and compromise the confidentiality of the monitored environment.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://packetstorm.news/files/id/160805/ | exploit |
| https://cxsecurity.com/issue/WLB-2021010050 | exploit |
| https://www.planex.co.jp/products/cs-qp50f/ | product |
| https://www.vulncheck.com/advisories/planex-cs-qp… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| PLANEX COMMUNICATIONS Inc. | CS-QP50F-ING2 |
Affected:
0
cpe:2.3:h:planex:cs-qp50f:-:*:*:*:*:*:*:* |
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CVE-2021-4461 (GCVE-0-2021-4461)
Vulnerability from cvelistv5 – Published: 2025-10-30 21:16 – Updated: 2025-11-28 19:17 X_Known Exploited Vulnerability
VLAI
EPSS
VEX
Title
Seeyon Zhiyuan OA Web Application System < 7.0 SP1 Authentication Bypass
Summary
Seeyon Zhiyuan OA Web Application System versions up to and including 7.0 SP1 improperly decode and parse the `enc` parameter in thirdpartyController.do. The decoded map values can influence session attributes without sufficient authentication/authorization checks, enabling attackers to assign a session to arbitrary user IDs. VulnCheck has observed this vulnerability being exploited in the wild as of 2025-10-30 at 00:30:40.855917 UTC.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://mp.weixin.qq.com/s/0AqdfTrZUVrwTMbKEKresg | exploit |
| https://github.com/chaitin/xray/blob/f90cf321bc4d… | exploit |
| https://github.com/projectdiscovery/nuclei-templa… | exploit |
| https://www.vulncheck.com/advisories/seeyon-zhiyu… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Seeyon | Zhiyuan OA Web Application System |
Affected:
0 , ≤ 7.0 SP1
(custom)
|
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Mitigation
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 accessible only by authorized parties. Developers sometimes perform authentication at the primary channel, but open up a secondary channel that is assumed to be private. For example, a login mechanism may be listening on one network port, but after successful authentication, it may open up a second port where it waits for the connection, but avoids authentication because it assumes that only the authenticated party will connect to the port.
- In general, if the software or protocol allows a single session or user state to persist across multiple connections or channels, authentication and appropriate credential management need to be used throughout.
Mitigation MIT-15
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.
Mitigation
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 tasks and authorization tasks.
- In environments such as the World Wide Web, the line between authentication and authorization is sometimes blurred. If custom authentication routines are required instead of those provided by the server, then these routines must be applied to every single page, since these pages could be requested directly.
Mitigation MIT-4.5
Architecture and Design
Strategy: Libraries or Frameworks
- 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].
Mitigation
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].
CAPEC-12: Choosing Message Identifier
This pattern of attack is defined by the selection of messages distributed via multicast or public information channels that are intended for another client by determining the parameter value assigned to that client. This attack allows the adversary to gain access to potentially privileged information, and to possibly perpetrate other attacks through the distribution means by impersonation. If the channel/message being manipulated is an input rather than output mechanism for the system, (such as a command bus), this style of attack could be used to change the adversary's identifier to more a privileged one.
CAPEC-166: Force the System to Reset Values
An attacker forces the target into a previous state in order to leverage potential weaknesses in the target dependent upon a prior configuration or state-dependent factors. Even in cases where an attacker may not be able to directly control the configuration of the targeted application, they may be able to reset the configuration to a prior state since many applications implement reset functions.
CAPEC-216: Communication Channel Manipulation
An adversary manipulates a setting or parameter on communications channel in order to compromise its security. This can result in information exposure, insertion/removal of information from the communications stream, and/or potentially system compromise.
CAPEC-36: Using Unpublished Interfaces or Functionality
An adversary searches for and invokes interfaces or functionality that the target system designers did not intend to be publicly available. If interfaces fail to authenticate requests, the attacker may be able to invoke functionality they are not authorized for.
CAPEC-62: Cross Site Request Forgery
An attacker crafts malicious web links and distributes them (via web pages, email, etc.), typically in a targeted manner, hoping to induce users to click on the link and execute the malicious action against some third-party application. If successful, the action embedded in the malicious link will be processed and accepted by the targeted application with the users' privilege level. This type of attack leverages the persistence and implicit trust placed in user session cookies by many web applications today. In such an architecture, once the user authenticates to an application and a session cookie is created on the user's system, all following transactions for that session are authenticated using that cookie including potential actions initiated by an attacker and simply "riding" the existing session cookie.