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.
3449 vulnerabilities reference this CWE, most recent first.
GHSA-V9X9-R7Q4-RFX4
Vulnerability from github – Published: 2022-06-09 00:00 – Updated: 2022-06-16 00:00The WPQA Builder WordPress plugin before 5.4 which is a companion to the Discy and Himer , lacks authentication in a REST API endpoint, allowing unauthenticated users to discover private questions sent between users on the site.
{
"affected": [],
"aliases": [
"CVE-2022-1598"
],
"database_specific": {
"cwe_ids": [
"CWE-284",
"CWE-306"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-06-08T10:15:00Z",
"severity": "MODERATE"
},
"details": "The WPQA Builder WordPress plugin before 5.4 which is a companion to the Discy and Himer , lacks authentication in a REST API endpoint, allowing unauthenticated users to discover private questions sent between users on the site.",
"id": "GHSA-v9x9-r7q4-rfx4",
"modified": "2022-06-16T00:00:26Z",
"published": "2022-06-09T00:00:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-1598"
},
{
"type": "WEB",
"url": "https://wpscan.com/vulnerability/0416ae2f-5670-4080-a88d-3484bb19d8c8"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-VC2P-5MXR-HX98
Vulnerability from github – Published: 2022-05-24 17:34 – Updated: 2022-05-24 17:34A vulnerability in the API of Cisco IoT Field Network Director (FND) could allow an unauthenticated, remote attacker to view sensitive information on an affected system. The vulnerability exists because the affected software does not properly authenticate API calls. An attacker could exploit this vulnerability by sending API requests to an affected system. A successful exploit could allow the attacker to view sensitive information on the affected system, including information about the devices that the system manages, without authentication.
{
"affected": [],
"aliases": [
"CVE-2020-3392"
],
"database_specific": {
"cwe_ids": [
"CWE-306"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-11-18T18:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in the API of Cisco IoT Field Network Director (FND) could allow an unauthenticated, remote attacker to view sensitive information on an affected system. The vulnerability exists because the affected software does not properly authenticate API calls. An attacker could exploit this vulnerability by sending API requests to an affected system. A successful exploit could allow the attacker to view sensitive information on the affected system, including information about the devices that the system manages, without authentication.",
"id": "GHSA-vc2p-5mxr-hx98",
"modified": "2022-05-24T17:34:34Z",
"published": "2022-05-24T17:34:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-3392"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-FND-APIA-xZntFS2V"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-VC3W-RPC8-4W8G
Vulnerability from github – Published: 2022-05-24 17:02 – Updated: 2022-06-18 00:00An exploitable denial-of-service vulnerability exists in the UDPRelay functionality of Shadowsocks-libev 3.3.2. When utilizing a Stream Cipher and a local_address, arbitrary UDP packets can cause a FATAL error code path and exit. An attacker can send arbitrary UDP packets to trigger this vulnerability.
{
"affected": [],
"aliases": [
"CVE-2019-5163"
],
"database_specific": {
"cwe_ids": [
"CWE-306",
"CWE-327"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-12-03T22:15:00Z",
"severity": "HIGH"
},
"details": "An exploitable denial-of-service vulnerability exists in the UDPRelay functionality of Shadowsocks-libev 3.3.2. When utilizing a Stream Cipher and a local_address, arbitrary UDP packets can cause a FATAL error code path and exit. An attacker can send arbitrary UDP packets to trigger this vulnerability.",
"id": "GHSA-vc3w-rpc8-4w8g",
"modified": "2022-06-18T00:00:27Z",
"published": "2022-05-24T17:02:37Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-5163"
},
{
"type": "WEB",
"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2019-0956"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00023.html"
},
{
"type": "WEB",
"url": "http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00061.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-VC7H-X557-3C32
Vulnerability from github – Published: 2022-05-02 03:28 – Updated: 2022-05-02 03:28admin.php in Frax.dk Php Recommend 1.3 and earlier does not require authentication when the user password is changed, which allows remote attackers to gain administrative privileges via modified form_admin_user and form_admin_pass parameters.
{
"affected": [],
"aliases": [
"CVE-2009-1780"
],
"database_specific": {
"cwe_ids": [
"CWE-306"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2009-05-22T20:30:00Z",
"severity": "HIGH"
},
"details": "admin.php in Frax.dk Php Recommend 1.3 and earlier does not require authentication when the user password is changed, which allows remote attackers to gain administrative privileges via modified form_admin_user and form_admin_pass parameters.",
"id": "GHSA-vc7h-x557-3c32",
"modified": "2022-05-02T03:28:38Z",
"published": "2022-05-02T03:28:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2009-1780"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/8658"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/34909"
},
{
"type": "WEB",
"url": "http://www.vupen.com/english/advisories/2009/1287"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-VC9X-CPX3-3533
Vulnerability from github – Published: 2022-05-24 16:46 – Updated: 2023-01-31 21:30A recently discovered security vulnerability affects all Bosch Video Management System (BVMS) versions 9.0 and below, DIVAR IP 2000, 3000, 5000 and 7000, Configuration Manager, Building Integration System (BIS) with Video Engine, Access Professional Edition (APE), Access Easy Controller (AEC), Bosch Video Client (BVC) and Video SDK (VSDK). The RCP+ network port allows access without authentication. Adding authentication feature to the respective library fixes the issue. The issue is classified as "CWE-284: Improper Access Control." This vulnerability, for example, allows a potential attacker to delete video or read video data.
{
"affected": [],
"aliases": [
"CVE-2019-6958"
],
"database_specific": {
"cwe_ids": [
"CWE-306"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-05-29T19:29:00Z",
"severity": "CRITICAL"
},
"details": "A recently discovered security vulnerability affects all Bosch Video Management System (BVMS) versions 9.0 and below, DIVAR IP 2000, 3000, 5000 and 7000, Configuration Manager, Building Integration System (BIS) with Video Engine, Access Professional Edition (APE), Access Easy Controller (AEC), Bosch Video Client (BVC) and Video SDK (VSDK). The RCP+ network port allows access without authentication. Adding authentication feature to the respective library fixes the issue. The issue is classified as \"CWE-284: Improper Access Control.\" This vulnerability, for example, allows a potential attacker to delete video or read video data.",
"id": "GHSA-vc9x-cpx3-3533",
"modified": "2023-01-31T21:30:18Z",
"published": "2022-05-24T16:46:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-6958"
},
{
"type": "WEB",
"url": "https://media.boschsecurity.com/fs/media/pb/security_advisories/bosch-2019-0404bt-cve-2019-6958_security_advisory_improper_access_control.pdf"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-VCC2-8QCW-J2M8
Vulnerability from github – Published: 2026-02-02 15:30 – Updated: 2026-02-02 15:30An unauthenticated remote attacker could potentially disrupt operations by switching between multiple configuration presets via Modbus (TCP).
{
"affected": [],
"aliases": [
"CVE-2022-50978"
],
"database_specific": {
"cwe_ids": [
"CWE-306"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-02T15:16:28Z",
"severity": "HIGH"
},
"details": "An unauthenticated remote attacker could potentially disrupt operations by switching between multiple configuration presets via Modbus (TCP).",
"id": "GHSA-vcc2-8qcw-j2m8",
"modified": "2026-02-02T15:30:34Z",
"published": "2026-02-02T15:30:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50978"
},
{
"type": "WEB",
"url": "https://www.innomic.com/.well-known/csaf/white/2026/ids-2026-0001.html"
},
{
"type": "WEB",
"url": "https://www.innomic.com/.well-known/csaf/white/2026/ids-2026-0001.json"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-VCQ6-MMFW-5XM3
Vulnerability from github – Published: 2026-03-31 21:31 – Updated: 2026-03-31 21:31The MAVLink communication protocol does not require cryptographic authentication by default. When MAVLink 2.0 message signing is not enabled, any message -- including SERIAL_CONTROL, which provides interactive shell access -- can be sent by an unauthenticated party with access to the MAVLink interface. PX4 provides MAVLink 2.0 message signing as the cryptographic authentication mechanism for all MAVLink communication. When signing is enabled, unsigned messages are rejected at the protocol level.
{
"affected": [],
"aliases": [
"CVE-2026-1579"
],
"database_specific": {
"cwe_ids": [
"CWE-306"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-31T21:16:27Z",
"severity": "CRITICAL"
},
"details": "The MAVLink communication protocol does not require cryptographic \nauthentication by default. When MAVLink 2.0 message signing is not \nenabled, any message -- including SERIAL_CONTROL, which provides \ninteractive shell access -- can be sent by an unauthenticated party with\n access to the MAVLink interface. PX4 provides MAVLink 2.0 message \nsigning as the cryptographic authentication mechanism for all MAVLink \ncommunication. When signing is enabled, unsigned messages are rejected \nat the protocol level.",
"id": "GHSA-vcq6-mmfw-5xm3",
"modified": "2026-03-31T21:31:19Z",
"published": "2026-03-31T21:31:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1579"
},
{
"type": "WEB",
"url": "https://docs.px4.io/main/en/mavlink/message_signing"
},
{
"type": "WEB",
"url": "https://docs.px4.io/main/en/mavlink/security_hardening"
},
{
"type": "WEB",
"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-090-02.json"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-090-02"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-VCXH-46F5-VX6R
Vulnerability from github – Published: 2026-01-09 12:32 – Updated: 2026-01-14 18:31Vivotek IP7137 camera with firmware version 0200a is vulnerable to an information disclosure issue where live camera footage can be accessed through the RTSP protocol on port 8554 without requiring authentication. This allows unauthorized users with network access to view the camera's feed, potentially compromising user privacy and security. The vendor has not replied to the CNA. Possibly all firmware versions are affected. Since the product has met End-Of-Life phase, a fix is not expected to be released.
{
"affected": [],
"aliases": [
"CVE-2025-66049"
],
"database_specific": {
"cwe_ids": [
"CWE-306"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-09T12:15:53Z",
"severity": "HIGH"
},
"details": "Vivotek\u00a0IP7137\u00a0camera with firmware version\u00a00200a is vulnerable to an information disclosure issue where live camera footage can be accessed through the RTSP protocol on port 8554 without requiring authentication. This allows unauthorized users with network access to view the camera\u0027s feed, potentially compromising user privacy and security.\u00a0\nThe vendor has not replied to the CNA. Possibly all firmware versions are affected.\u00a0Since the product has met End-Of-Life phase, a fix is not expected to be released.",
"id": "GHSA-vcxh-46f5-vx6r",
"modified": "2026-01-14T18:31:17Z",
"published": "2026-01-09T12:32:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-66049"
},
{
"type": "WEB",
"url": "https://cert.pl/posts/2026/01/CVE-2025-66049"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-VF53-387H-6JJ3
Vulnerability from github – Published: 2022-05-24 17:16 – Updated: 2023-05-16 21:30ABB MicroSCADA Pro SYS600 version 9.3 suffers from an instance of CWE-306: Missing Authentication for Critical Function.
{
"affected": [],
"aliases": [
"CVE-2019-5620"
],
"database_specific": {
"cwe_ids": [
"CWE-306"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-04-29T23:15:00Z",
"severity": "HIGH"
},
"details": "ABB MicroSCADA Pro SYS600 version 9.3 suffers from an instance of CWE-306: Missing Authentication for Critical Function.",
"id": "GHSA-vf53-387h-6jj3",
"modified": "2023-05-16T21:30:17Z",
"published": "2022-05-24T17:16:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-5620"
},
{
"type": "WEB",
"url": "https://www.rapid7.com/db/modules/exploit/windows/scada/abb_wserver_exec"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-VFWF-QWPX-47FH
Vulnerability from github – Published: 2026-03-23 18:30 – Updated: 2026-03-31 21:31A missing authentication check in the HTTP server on TP-Link Archer NX200, NX210, NX500 and NX600 to certain cgi endpoints allows unauthenticated access intended for authenticated users. An attacker may perform privileged HTTP actions without authentication, including firmware upload and configuration operations.
{
"affected": [],
"aliases": [
"CVE-2025-15517"
],
"database_specific": {
"cwe_ids": [
"CWE-306"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-23T18:16:22Z",
"severity": "HIGH"
},
"details": "A missing authentication check in the HTTP server on TP-Link Archer NX200, NX210, NX500 and NX600 to certain cgi endpoints allows unauthenticated access intended for authenticated users. An attacker may perform privileged HTTP actions without authentication, including firmware upload and configuration operations.",
"id": "GHSA-vfwf-qwpx-47fh",
"modified": "2026-03-31T21:31:13Z",
"published": "2026-03-23T18:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-15517"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/en/support/download/archer-nx200/#Firmware"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/en/support/download/archer-nx210/#Firmware"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/en/support/download/archer-nx500/#Firmware"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/en/support/download/archer-nx600/#Firmware"
},
{
"type": "WEB",
"url": "https://www.tp-link.com/us/support/faq/5027"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
Mitigation
- 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
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
- 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
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
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.