Common Weakness Enumeration

CWE-287

Discouraged

Improper Authentication

Abstraction: Class · Status: Draft

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

5970 vulnerabilities reference this CWE, most recent first.

GHSA-6XH8-8PFV-53VX

Vulnerability from github – Published: 2024-06-05 14:17 – Updated: 2024-06-05 14:17
VLAI
Summary
Authentication Bypass in TYPO3 CMS
Details

The default authentication service misses to invalidate empty strings as password. Therefore it is possible to authenticate backend and frontend users without password set in the database. Note: TYPO3 does not allow to create user accounts without a password. Your TYPO3 installation might only be affected if there is a third party component creating user accounts without password by directly manipulating the database.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "typo3/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.2.20"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "typo3/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.6.0"
            },
            {
              "fixed": "7.6.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "typo3/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-06-05T14:17:20Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "The default authentication service misses to invalidate empty strings as password. Therefore it is possible to authenticate backend and frontend users without password set in the database.\nNote: TYPO3 does not allow to create user accounts without a password. Your TYPO3 installation might only be affected if there is a third party component creating user accounts without password by directly manipulating the database.\n\n",
  "id": "GHSA-6xh8-8pfv-53vx",
  "modified": "2024-06-05T14:17:20Z",
  "published": "2024-06-05T14:17:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/2016-04-12-3.yaml"
    },
    {
      "type": "WEB",
      "url": "https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2016-011"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Authentication Bypass in TYPO3 CMS"
}

GHSA-6XPC-MQMQ-W9X7

Vulnerability from github – Published: 2022-05-13 01:33 – Updated: 2022-05-13 01:33
VLAI
Details

The product M2M ETHERNET (FW Versions 2.22 and prior, ETH-FW Versions 1.01 and prior) is vulnerable in that an attacker can upload a malicious language file by bypassing the user authentication mechanism.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2018-17926"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2019-01-31T17:29:00Z",
    "severity": "MODERATE"
  },
  "details": "The product M2M ETHERNET (FW Versions 2.22 and prior, ETH-FW Versions 1.01 and prior) is vulnerable in that an attacker can upload a malicious language file by bypassing the user authentication mechanism.",
  "id": "GHSA-6xpc-mqmq-w9x7",
  "modified": "2022-05-13T01:33:46Z",
  "published": "2022-05-13T01:33:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-17926"
    },
    {
      "type": "WEB",
      "url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-352-07"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/106243"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-6XPF-FQMV-9F57

Vulnerability from github – Published: 2022-01-22 00:00 – Updated: 2022-04-30 00:01
VLAI
Details

Fresenius Kabi Agilia Link + version 3.0 has a default configuration page accessible without authentication. An attacker may use this functionality to change the exposed configuration values such as network settings.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2021-33843"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287",
      "CWE-306"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-01-21T19:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Fresenius Kabi Agilia Link + version 3.0 has a default configuration page accessible without authentication. An attacker may use this functionality to change the exposed configuration values such as network settings.",
  "id": "GHSA-6xpf-fqmv-9f57",
  "modified": "2022-04-30T00:01:09Z",
  "published": "2022-01-22T00:00:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33843"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/uscert/ics/advisories/icsma-21-355-01"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-722G-WG5C-74M2

Vulnerability from github – Published: 2023-01-17 12:30 – Updated: 2023-01-25 00:30
VLAI
Details

m-FILTER prior to Ver.5.70R01 (Ver.5 Series) and m-FILTER prior to Ver.4.87R04 (Ver.4 Series) allows a remote unauthenticated attacker to bypass authentication and send users' unintended email when email is being sent under the certain conditions. The attacks exploiting this vulnerability have been observed.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2023-22278"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-01-17T10:15:00Z",
    "severity": "MODERATE"
  },
  "details": "m-FILTER prior to Ver.5.70R01 (Ver.5 Series) and m-FILTER prior to Ver.4.87R04 (Ver.4 Series) allows a remote unauthenticated attacker to bypass authentication and send users\u0027 unintended email when email is being sent under the certain conditions. The attacks exploiting this vulnerability have been observed.",
  "id": "GHSA-722g-wg5c-74m2",
  "modified": "2023-01-25T00:30:38Z",
  "published": "2023-01-17T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-22278"
    },
    {
      "type": "WEB",
      "url": "https://jvn.jp/en/jp/JVN55675303/index.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-7254-J628-HMWG

Vulnerability from github – Published: 2022-05-01 23:57 – Updated: 2025-04-09 03:56
VLAI
Details

js/pages/pages_data.php in AuraCMS 2.2 through 2.2.2 does not perform authentication, which allows remote attackers to add, edit, and delete web content via a modified id parameter.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2008-3203"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2008-07-17T13:41:00Z",
    "severity": "HIGH"
  },
  "details": "js/pages/pages_data.php in AuraCMS 2.2 through 2.2.2 does not perform authentication, which allows remote attackers to add, edit, and delete web content via a modified id parameter.",
  "id": "GHSA-7254-j628-hmwg",
  "modified": "2025-04-09T03:56:39Z",
  "published": "2022-05-01T23:57:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2008-3203"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/43682"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/6033"
    },
    {
      "type": "WEB",
      "url": "http://secunia.com/advisories/31000"
    },
    {
      "type": "WEB",
      "url": "http://www.auracms.org"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/30169"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GHSA-727C-Q756-HCP2

Vulnerability from github – Published: 2026-05-09 12:30 – Updated: 2026-05-09 12:30
VLAI
Details

A security vulnerability has been detected in UGREEN CM933 1.1.59.4319. The impacted element is an unknown function of the component Administrative Interface. Such manipulation leads to missing authentication. The attack requires being on the local network. You should upgrade the affected component. The vendor replied: "We have successfully confirmed and reproduced the issue. We take this matter very seriously and have incorporated the fix into our development schedule. The issue is scheduled to be resolved in the release version coming in late April."

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-8185"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-09T11:16:28Z",
    "severity": "MODERATE"
  },
  "details": "A security vulnerability has been detected in UGREEN CM933 1.1.59.4319. The impacted element is an unknown function of the component Administrative Interface. Such manipulation leads to missing authentication. The attack requires being on the local network. You should upgrade the affected component. The vendor replied: \"We have successfully confirmed and reproduced the issue. We take this matter very seriously and have incorporated the fix into our development schedule. The issue is scheduled to be resolved in the release version coming in late April.\"",
  "id": "GHSA-727c-q756-hcp2",
  "modified": "2026-05-09T12:30:20Z",
  "published": "2026-05-09T12:30:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-8185"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/793588"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/362337"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/362337/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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-72GV-QQRP-H9QG

Vulnerability from github – Published: 2022-05-13 01:13 – Updated: 2024-01-12 16:10
VLAI
Summary
Moodle Users Can Bypass Deleted Status
Details

The webservices functionality in Moodle 2.0.x before 2.0.7, 2.1.x before 2.1.4, and 2.2.x before 2.2.1 allows remote authenticated users to bypass the deleted status and continue using a server via a token.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "moodle/moodle"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.2"
            },
            {
              "fixed": "2.2.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "moodle/moodle"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.1"
            },
            {
              "fixed": "2.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "moodle/moodle"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0"
            },
            {
              "fixed": "2.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2012-0797"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-01-12T16:10:49Z",
    "nvd_published_at": "2012-07-17T10:20:00Z",
    "severity": "MODERATE"
  },
  "details": "The webservices functionality in Moodle 2.0.x before 2.0.7, 2.1.x before 2.1.4, and 2.2.x before 2.2.1 allows remote authenticated users to bypass the deleted status and continue using a server via a token.",
  "id": "GHSA-72gv-qqrp-h9qg",
  "modified": "2024-01-12T16:10:49Z",
  "published": "2022-05-13T01:13:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2012-0797"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moodle/moodle/commit/364622b4662d9f349f3701ed548cda2f31491fea"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moodle/moodle/commit/bbcde38b334ecbfa2a18b01b77a7e995b2c0d9f7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moodle/moodle/commit/dbfa519ad9e4d33ac3a4cd506d606d56a2f0bbff"
    },
    {
      "type": "WEB",
      "url": "https://github.com/moodle/moodle/commit/e922d9a90bab337b1082fbe28c352c18cae2580e"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=783532"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/moodle/moodle"
    },
    {
      "type": "WEB",
      "url": "http://git.moodle.org/gw?p=moodle.git\u0026a=search\u0026h=HEAD\u0026st=commit\u0026s=MDL-28126"
    },
    {
      "type": "WEB",
      "url": "http://moodle.org/mod/forum/discuss.php?d=194016"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Moodle Users Can Bypass Deleted Status"
}

GHSA-72J4-QP7M-QXCR

Vulnerability from github – Published: 2022-05-13 01:35 – Updated: 2022-05-13 01:35
VLAI
Details

An insecure SSHD configuration in Juniper Device Manager (JDM) and host OS on Juniper NFX Series devices may allow remote unauthenticated access if any of the passwords on the system are empty. The affected SSHD configuration has the PermitEmptyPasswords option set to "yes". Affected releases are Juniper Networks Junos OS: 18.1 versions prior to 18.1R4 on NFX Series.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2018-0044"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-10-10T18:29:00Z",
    "severity": "HIGH"
  },
  "details": "An insecure SSHD configuration in Juniper Device Manager (JDM) and host OS on Juniper NFX Series devices may allow remote unauthenticated access if any of the passwords on the system are empty. The affected SSHD configuration has the PermitEmptyPasswords option set to \"yes\". Affected releases are Juniper Networks Junos OS: 18.1 versions prior to 18.1R4 on NFX Series.",
  "id": "GHSA-72j4-qp7m-qxcr",
  "modified": "2022-05-13T01:35:57Z",
  "published": "2022-05-13T01:35:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-0044"
    },
    {
      "type": "WEB",
      "url": "https://kb.juniper.net/JSA10878"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/105565"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-72M6-23FF-7Q26

Vulnerability from github – Published: 2022-05-14 01:14 – Updated: 2023-12-20 19:27
VLAI
Summary
Improper Authentication in Apache WSS4J
Details

The LDAPLoginModule implementation in the Java Authentication and Authorization Service (JAAS) in Apache ActiveMQ 5.x before 5.10.1 allows remote attackers to bypass authentication by logging in with an empty password and valid username, which triggers an unauthenticated bind. NOTE: this identifier has been SPLIT per ADT2 due to different vulnerability types. See CVE-2015-6524 for the use of wildcard operators in usernames.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.activemq:activemq-broker"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.activemq:activemq-jaas"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "5.10.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2014-3612"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-07-07T22:34:06Z",
    "nvd_published_at": "2015-08-24T14:59:00Z",
    "severity": "HIGH"
  },
  "details": "The LDAPLoginModule implementation in the Java Authentication and Authorization Service (JAAS) in Apache ActiveMQ 5.x before 5.10.1 allows remote attackers to bypass authentication by logging in with an empty password and valid username, which triggers an unauthenticated bind. NOTE: this identifier has been SPLIT per ADT2 due to different vulnerability types. See CVE-2015-6524 for the use of wildcard operators in usernames.",
  "id": "GHSA-72m6-23ff-7q26",
  "modified": "2023-12-20T19:27:49Z",
  "published": "2022-05-14T01:14:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-3612"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/activemq/commit/22f2f3dde757d31307da772d579815c1d169bc39"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apache/activemq"
    },
    {
      "type": "WEB",
      "url": "https://issues.apache.org/jira/browse/AMQ-5345"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/a859563f05fbe7c31916b3178c2697165bd9bbf5a65d1cf62aef27d2%40%3Ccommits.activemq.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread.html/a859563f05fbe7c31916b3178c2697165bd9bbf5a65d1cf62aef27d2@%3Ccommits.activemq.apache.org%3E"
    },
    {
      "type": "WEB",
      "url": "http://activemq.apache.org/security-advisories.data/CVE-2014-3612-announcement.txt"
    },
    {
      "type": "WEB",
      "url": "http://rhn.redhat.com/errata/RHSA-2015-0137.html"
    },
    {
      "type": "WEB",
      "url": "http://rhn.redhat.com/errata/RHSA-2015-0138.html"
    },
    {
      "type": "WEB",
      "url": "http://seclists.org/oss-sec/2015/q1/427"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/72513"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Improper Authentication in Apache WSS4J"
}

GHSA-72P9-6GC7-Q93R

Vulnerability from github – Published: 2022-05-17 04:42 – Updated: 2023-02-08 18:05
VLAI
Summary
OpenStack Neutron Improper Authentication vulnerability
Details

The l3-agent in OpenStack Neutron 2012.2 before 2013.2.3 does not check the tenant id when creating ports, which allows remote authenticated users to plug ports into the routers of arbitrary tenants via the device id in a port-create command.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "neutron"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2012.2"
            },
            {
              "fixed": "2013.2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2014-0056"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-02-08T18:05:05Z",
    "nvd_published_at": "2014-05-08T14:29:00Z",
    "severity": "MODERATE"
  },
  "details": "The l3-agent in OpenStack Neutron 2012.2 before 2013.2.3 does not check the tenant id when creating ports, which allows remote authenticated users to plug ports into the routers of arbitrary tenants via the device id in a port-create command.",
  "id": "GHSA-72p9-6gc7-q93r",
  "modified": "2023-02-08T18:05:05Z",
  "published": "2022-05-17T04:42:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-0056"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2014:0516"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2014-0056"
    },
    {
      "type": "WEB",
      "url": "https://bugs.launchpad.net/neutron/+bug/1243327"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1063141"
    },
    {
      "type": "PACKAGE",
      "url": "https://opendev.org/openstack/neutron"
    },
    {
      "type": "WEB",
      "url": "http://rhn.redhat.com/errata/RHSA-2014-0516.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2014/03/27/5"
    },
    {
      "type": "WEB",
      "url": "http://www.ubuntu.com/usn/USN-2194-1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "OpenStack Neutron Improper Authentication vulnerability"
}

Mitigation
Architecture and Design

Strategy: Libraries or Frameworks

Use an authentication framework or library such as the OWASP ESAPI Authentication feature.

CAPEC-114: Authentication Abuse

An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker.

CAPEC-115: Authentication Bypass

An attacker gains access to application, service, or device with the privileges of an authorized or privileged user by evading or circumventing an authentication mechanism. The attacker is therefore able to access protected data without authentication ever having taken place.

CAPEC-151: Identity Spoofing

Identity Spoofing refers to the action of assuming (i.e., taking on) the identity of some other entity (human or non-human) and then using that identity to accomplish a goal. An adversary may craft messages that appear to come from a different principle or use stolen / spoofed authentication credentials.

CAPEC-194: Fake the Source of Data

An adversary takes advantage of improper authentication to provide data or services under a falsified identity. The purpose of using the falsified identity may be to prevent traceability of the provided data or to assume the rights granted to another individual. One of the simplest forms of this attack would be the creation of an email message with a modified "From" field in order to appear that the message was sent from someone other than the actual sender. The root of the attack (in this case the email system) fails to properly authenticate the source and this results in the reader incorrectly performing the instructed action. Results of the attack vary depending on the details of the attack, but common results include privilege escalation, obfuscation of other attacks, and data corruption/manipulation.

CAPEC-22: Exploiting Trust in Client

An attack of this type exploits vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by communicating directly with the server where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.

CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data

This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to obtain sensitive data once SSL is terminated.

CAPEC-593: Session Hijacking

This type of attack involves an adversary that exploits weaknesses in an application's use of sessions in performing authentication. The adversary is able to steal or manipulate an active session and use it to gain unathorized access to the application.

CAPEC-633: Token Impersonation

An adversary exploits a weakness in authentication to create an access token (or equivalent) that impersonates a different entity, and then associates a process/thread to that that impersonated token. This action causes a downstream user to make a decision or take action that is based on the assumed identity, and not the response that blocks the adversary.

CAPEC-650: Upload a Web Shell to a Web Server

By exploiting insufficient permissions, it is possible to upload a web shell to a web server in such a way that it can be executed remotely. This shell can have various capabilities, thereby acting as a "gateway" to the underlying web server. The shell might execute at the higher permission level of the web server, providing the ability the execute malicious code at elevated levels.

CAPEC-94: Adversary in the Middle (AiTM)

An adversary targets the communication between two components (typically client and server), in order to alter or obtain data from transactions. A general approach entails the adversary placing themself within the communication channel between the two components.