Common Weakness Enumeration

CWE-77

Allowed-with-Review

Improper Neutralization of Special Elements used in a Command ('Command Injection')

Abstraction: Class · Status: Draft

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

5386 vulnerabilities reference this CWE, most recent first.

GHSA-P46Q-3RXC-CXFJ

Vulnerability from github – Published: 2024-07-24 21:31 – Updated: 2024-07-24 21:31
VLAI
Details

A vulnerability exists in the HPE Aruba Networking EdgeConnect SD-WAN gateway's Command Line Interface that allows remote authenticated users to run arbitrary commands on the underlying host. Successful exploitation of this vulnerability will result in the ability to execute arbitrary commands as root on the underlying operating system leading to complete system compromise

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-41133"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-24T20:15:04Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability exists in the HPE Aruba Networking EdgeConnect SD-WAN gateway\u0027s Command Line Interface that allows remote authenticated users to run arbitrary commands on the underlying host. Successful exploitation of this vulnerability will result in the ability to execute arbitrary commands as root on the underlying operating system leading to complete system compromise",
  "id": "GHSA-p46q-3rxc-cxfj",
  "modified": "2024-07-24T21:31:30Z",
  "published": "2024-07-24T21:31:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-41133"
    },
    {
      "type": "WEB",
      "url": "https://csaf.arubanetworks.com/2024/hpe_aruba_networking_-_hpesbnw04673.txt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P4GR-X7C7-6F67

Vulnerability from github – Published: 2025-10-10 18:31 – Updated: 2025-10-10 21:31
VLAI
Details

An arbitrary file upload vulnerability in MCMS v6.0.1 allows attackers to execute arbitrary code via uploading a crafted file.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-60838"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-10T18:15:40Z",
    "severity": "MODERATE"
  },
  "details": "An arbitrary file upload vulnerability in MCMS v6.0.1 allows attackers to execute arbitrary code via uploading a crafted file.",
  "id": "GHSA-p4gr-x7c7-6f67",
  "modified": "2025-10-10T21:31:15Z",
  "published": "2025-10-10T18:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-60838"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/xuzhiwei66666666/8a990104861ce31cf73ea38e7eb32a7d"
    },
    {
      "type": "WEB",
      "url": "https://gitee.com/mingSoft/MCMS"
    },
    {
      "type": "WEB",
      "url": "http://mcms.com"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P4MQ-J63Q-GRFW

Vulnerability from github – Published: 2022-04-28 00:00 – Updated: 2022-05-12 00:01
VLAI
Details

In Bender/ebee Charge Controllers in multiple versions are prone to Command injection via Web interface. An authenticated attacker could enter shell commands into some input fields.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-34592"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-04-27T16:15:00Z",
    "severity": "HIGH"
  },
  "details": "In Bender/ebee Charge Controllers in multiple versions are prone to Command injection via Web interface. An authenticated attacker could enter shell commands into some input fields.",
  "id": "GHSA-p4mq-j63q-grfw",
  "modified": "2022-05-12T00:01:21Z",
  "published": "2022-04-28T00:00:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-34592"
    },
    {
      "type": "WEB",
      "url": "https://cert.vde.com/en/advisories/VDE-2021-047"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P4R4-R264-P9HW

Vulnerability from github – Published: 2026-05-12 21:31 – Updated: 2026-05-12 21:31
VLAI
Details

A command injection vulnerability exists in the web-based management interface of AOS-8 and AOS-10 Operating Systems. Successful exploitation could allow an authenticated remote attacker to place arbitrary files on the underlying filesystem of the affected device.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-44872"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-12T20:16:45Z",
    "severity": "HIGH"
  },
  "details": "A command injection vulnerability exists in the web-based management interface of AOS-8 and AOS-10 Operating Systems. Successful exploitation could allow an authenticated remote attacker to place arbitrary files on the underlying filesystem of the affected device.",
  "id": "GHSA-p4r4-r264-p9hw",
  "modified": "2026-05-12T21:31:35Z",
  "published": "2026-05-12T21:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44872"
    },
    {
      "type": "WEB",
      "url": "https://support.hpe.com/hpesc/public/docDisplay?docId=hpesbnw05048en_us\u0026docLocale=en_US"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P4R5-F3WJ-4X9M

Vulnerability from github – Published: 2022-05-24 19:03 – Updated: 2022-05-24 19:03
VLAI
Details

Multiple vulnerabilities in the web-based management interface of certain Cisco Small Business 100, 300, and 500 Series Wireless Access Points could allow an authenticated, remote attacker to perform command injection attacks against an affected device. These vulnerabilities are due to improper validation of user-supplied input. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to the web-based management interface of an affected system. A successful exploit could allow the attacker to execute arbitrary commands with root privileges on the device. To exploit these vulnerabilities, the attacker must have valid administrative credentials for the device.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-1550"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-05-22T07:15:00Z",
    "severity": "HIGH"
  },
  "details": "Multiple vulnerabilities in the web-based management interface of certain Cisco Small Business 100, 300, and 500 Series Wireless Access Points could allow an authenticated, remote attacker to perform command injection attacks against an affected device. These vulnerabilities are due to improper validation of user-supplied input. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to the web-based management interface of an affected system. A successful exploit could allow the attacker to execute arbitrary commands with root privileges on the device. To exploit these vulnerabilities, the attacker must have valid administrative credentials for the device.",
  "id": "GHSA-p4r5-f3wj-4x9m",
  "modified": "2022-05-24T19:03:00Z",
  "published": "2022-05-24T19:03:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-1550"
    },
    {
      "type": "WEB",
      "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb-wap-inject-Mp9FSdG"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-P4VR-G7JV-763Q

Vulnerability from github – Published: 2022-03-17 00:00 – Updated: 2022-03-23 00:00
VLAI
Details

Arris routers SBR-AC1900P 1.0.7-B05, SBR-AC3200P 1.0.7-B05 and SBR-AC1200P 1.0.5-B05 were discovered to contain a command injection vulnerability in the firewall-local log function via the EmailAddress, SmtpServerName, SmtpUsername, and SmtpPassword parameters. This vulnerability allows attackers to execute arbitrary commands via a crafted request.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2022-26990"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-03-15T22:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "Arris routers SBR-AC1900P 1.0.7-B05, SBR-AC3200P 1.0.7-B05 and SBR-AC1200P 1.0.5-B05 were discovered to contain a command injection vulnerability in the firewall-local log function via the EmailAddress, SmtpServerName, SmtpUsername, and SmtpPassword parameters. This vulnerability allows attackers to execute arbitrary commands via a crafted request.",
  "id": "GHSA-p4vr-g7jv-763q",
  "modified": "2022-03-23T00:00:36Z",
  "published": "2022-03-17T00:00:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-26990"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wudipjq/my_vuln/blob/main/ARRIS/vuln_2/2.md"
    }
  ],
  "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-P52J-P77C-RQF9

Vulnerability from github – Published: 2024-02-28 00:31 – Updated: 2025-03-27 15:30
VLAI
Details

Vulnerabilities in the ClearPass Policy Manager web-based management interface allow remote authenticated users to run arbitrary commands on the underlying host. A successful exploit could allow an attacker to execute arbitrary commands as root on the underlying operating system leading to complete system compromise.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2024-26297"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-27T22:15:15Z",
    "severity": "HIGH"
  },
  "details": "Vulnerabilities in the ClearPass Policy Manager web-based management interface allow remote authenticated users to run arbitrary commands on the underlying host. A successful exploit could allow an attacker to execute arbitrary commands as root on the underlying operating system leading to complete system compromise.",
  "id": "GHSA-p52j-p77c-rqf9",
  "modified": "2025-03-27T15:30:52Z",
  "published": "2024-02-28T00:31:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26297"
    },
    {
      "type": "WEB",
      "url": "https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2024-001.txt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-P533-WC7F-4JVP

Vulnerability from github – Published: 2025-06-16 03:30 – Updated: 2025-06-16 03:30
VLAI
Details

A vulnerability, which was classified as critical, has been found in Wifi-soft UniBox Controller up to 20250506. Affected by this issue is some unknown functionality of the file /billing/test_accesscodelogin.php. The manipulation of the argument Password leads to os command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2025-6103"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-16T03:15:42Z",
    "severity": "HIGH"
  },
  "details": "A vulnerability, which was classified as critical, has been found in Wifi-soft UniBox Controller up to 20250506. Affected by this issue is some unknown functionality of the file /billing/test_accesscodelogin.php. The manipulation of the argument Password leads to os command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
  "id": "GHSA-p533-wc7f-4jvp",
  "modified": "2025-06-16T03:30:26Z",
  "published": "2025-06-16T03:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6103"
    },
    {
      "type": "WEB",
      "url": "https://github.com/h0e4a0r1t/h0e4a0r1t.github.io/blob/master/2025/1/Command%20Injection%20Vulnerability%20in%20Wifi-soft%20UniBox%20controller-billing-test_accesscodelogin.pdf"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.312572"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.312572"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?submit.590734"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/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-P54G-PPX4-2GR7

Vulnerability from github – Published: 2021-12-27 00:00 – Updated: 2022-01-06 00:00
VLAI
Details

Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, RBK752 before 3.2.17.12, RBR750 before 3.2.17.12, RBS750 before 3.2.17.12, RBK852 before 3.2.17.12, RBR850 before 3.2.17.12, and RBS850 before 3.2.17.12.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-45631"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-12-26T01:15:00Z",
    "severity": "HIGH"
  },
  "details": "Certain NETGEAR devices are affected by command injection by an unauthenticated attacker. This affects CBR40 before 2.5.0.24, CBR750 before 4.6.3.6, RBK752 before 3.2.17.12, RBR750 before 3.2.17.12, RBS750 before 3.2.17.12, RBK852 before 3.2.17.12, RBR850 before 3.2.17.12, and RBS850 before 3.2.17.12.",
  "id": "GHSA-p54g-ppx4-2gr7",
  "modified": "2022-01-06T00:00:50Z",
  "published": "2021-12-27T00:00:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45631"
    },
    {
      "type": "WEB",
      "url": "https://kb.netgear.com/000064136/Security-Advisory-for-Pre-Authentication-Command-Injection-on-Some-WiFi-Systems-PSV-2020-0504"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-P576-J8JP-6QR7

Vulnerability from github – Published: 2023-01-06 12:31 – Updated: 2023-01-12 18:30
VLAI
Details

A vulnerability was found in trampgeek jobe up to 1.6.x and classified as critical. This issue affects the function run_in_sandbox of the file application/libraries/LanguageTask.php. The manipulation leads to command injection. Upgrading to version 1.7.0 is able to address this issue. The name of the patch is 8f43daf50c943b98eaf0c542da901a4a16e85b02. It is recommended to upgrade the affected component. The identifier VDB-217553 was assigned to this vulnerability.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2020-36642"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-01-06T11:15:00Z",
    "severity": "CRITICAL"
  },
  "details": "A vulnerability was found in trampgeek jobe up to 1.6.x and classified as critical. This issue affects the function run_in_sandbox of the file application/libraries/LanguageTask.php. The manipulation leads to command injection. Upgrading to version 1.7.0 is able to address this issue. The name of the patch is 8f43daf50c943b98eaf0c542da901a4a16e85b02. It is recommended to upgrade the affected component. The identifier VDB-217553 was assigned to this vulnerability.",
  "id": "GHSA-p576-j8jp-6qr7",
  "modified": "2023-01-12T18:30:29Z",
  "published": "2023-01-06T12:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36642"
    },
    {
      "type": "WEB",
      "url": "https://github.com/trampgeek/jobe/issues/39"
    },
    {
      "type": "WEB",
      "url": "https://github.com/trampgeek/jobe/commit/8f43daf50c943b98eaf0c542da901a4a16e85b02"
    },
    {
      "type": "WEB",
      "url": "https://github.com/trampgeek/jobe/releases/tag/v1.7.0"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?ctiid.217553"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/?id.217553"
    }
  ],
  "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"
    }
  ]
}

Mitigation
Architecture and Design

If at all possible, use library calls rather than external processes to recreate the desired functionality.

Mitigation
Implementation

If possible, ensure that all external commands called from the program are statically created.

Mitigation MIT-5
Implementation

Strategy: Input Validation

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Mitigation
Operation

Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.

Mitigation
System Configuration

Assign permissions that prevent the user from accessing/opening privileged files.

CAPEC-136: LDAP Injection

An attacker manipulates or crafts an LDAP query for the purpose of undermining the security of the target. Some applications use user input to create LDAP queries that are processed by an LDAP server. For example, a user might provide their username during authentication and the username might be inserted in an LDAP query during the authentication process. An attacker could use this input to inject additional commands into an LDAP query that could disclose sensitive information. For example, entering a * in the aforementioned query might return information about all users on the system. This attack is very similar to an SQL injection attack in that it manipulates a query to gather additional information or coerce a particular return value.

CAPEC-15: Command Delimiters

An attack of this type exploits a programs' vulnerabilities that allows an attacker's commands to be concatenated onto a legitimate command with the intent of targeting other resources such as the file system or database. The system that uses a filter or denylist input validation, as opposed to allowlist validation is vulnerable to an attacker who predicts delimiters (or combinations of delimiters) not present in the filter or denylist. As with other injection attacks, the attacker uses the command delimiter payload as an entry point to tunnel through the application and activate additional attacks through SQL queries, shell commands, network scanning, and so on.

CAPEC-183: IMAP/SMTP Command Injection

An adversary exploits weaknesses in input validation on web-mail servers to execute commands on the IMAP/SMTP server. Web-mail servers often sit between the Internet and the IMAP or SMTP mail server. User requests are received by the web-mail servers which then query the back-end mail server for the requested information and return this response to the user. In an IMAP/SMTP command injection attack, mail-server commands are embedded in parts of the request sent to the web-mail server. If the web-mail server fails to adequately sanitize these requests, these commands are then sent to the back-end mail server when it is queried by the web-mail server, where the commands are then executed. This attack can be especially dangerous since administrators may assume that the back-end server is protected against direct Internet access and therefore may not secure it adequately against the execution of malicious commands.

CAPEC-248: Command Injection

An adversary looking to execute a command of their choosing, injects new items into an existing command thus modifying interpretation away from what was intended. Commands in this context are often standalone strings that are interpreted by a downstream component and cause specific responses. This type of attack is possible when untrusted values are used to build these command strings. Weaknesses in input validation or command construction can enable the attack and lead to successful exploitation.

CAPEC-40: Manipulating Writeable Terminal Devices

This attack exploits terminal devices that allow themselves to be written to by other users. The attacker sends command strings to the target terminal device hoping that the target user will hit enter and thereby execute the malicious command with their privileges. The attacker can send the results (such as copying /etc/passwd) to a known directory and collect once the attack has succeeded.

CAPEC-43: Exploiting Multiple Input Interpretation Layers

An attacker supplies the target software with input data that contains sequences of special characters designed to bypass input validation logic. This exploit relies on the target making multiples passes over the input data and processing a "layer" of special characters with each pass. In this manner, the attacker can disguise input that would otherwise be rejected as invalid by concealing it with layers of special/escape characters that are stripped off by subsequent processing steps. The goal is to first discover cases where the input validation layer executes before one or more parsing layers. That is, user input may go through the following logic in an application: <parser1> --> <input validator> --> <parser2>. In such cases, the attacker will need to provide input that will pass through the input validator, but after passing through parser2, will be converted into something that the input validator was supposed to stop.

CAPEC-75: Manipulating Writeable Configuration Files

Generally these are manually edited files that are not in the preview of the system administrators, any ability on the attackers' behalf to modify these files, for example in a CVS repository, gives unauthorized access directly to the application, the same as authorized users.

CAPEC-76: Manipulating Web Input to File System Calls

An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.