Common Weakness Enumeration

CWE-603

Allowed

Use of Client-Side Authentication

Abstraction: Base · Status: Draft

API response cwe.mitre.org

A client/server product performs authentication within client code but not in server code, allowing server-side authentication to be bypassed via a modified client that omits the authentication check.

45 vulnerabilities reference this CWE, most recent first.

CVE-2020-7591 (GCVE-0-2020-7591)

Vulnerability from cvelistv5 – Published: 2020-10-15 18:45 – Updated: 2024-08-04 09:33
VLAI
Summary
A vulnerability has been identified in SIPORT MP (All versions < 3.2.1). Vulnerable versions of the device could allow an authenticated attacker to impersonate other users of the system and perform (potentially administrative) actions on behalf of those users if the single sign-on feature ("Allow logon without password") is enabled.
Severity
No CVSS data available.
CWE
  • CWE-603 - Use of Client-Side Authentication
Assigner
References
Impacted products
Vendor Product Version
Siemens SIPORT MP Affected: All versions < 3.2.1
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2020-6988 (GCVE-0-2020-6988)

Vulnerability from cvelistv5 – Published: 2020-03-16 15:38 – Updated: 2026-06-03 13:21
VLAI
Summary
Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, A remote, unauthenticated attacker can send a request from the RSLogix 500 software to the victim’s MicroLogix controller. The controller will then respond to the client with used password values to authenticate the user on the client-side. This method of authentication may allow an attacker to bypass authentication altogether, disclose sensitive information, or leak credentials.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-03 13:21 UTC
CWE
  • CWE-603 - USE OF CLIENT-SIDE AUTHENTICATION CWE-603
Assigner
References
Impacted products
Vendor Product Version
n/a Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior Affected: Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior
Show details on NVD website
To clipboard 

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CVE-2017-7909 (GCVE-0-2017-7909)

Vulnerability from cvelistv5 – Published: 2017-05-06 00:00 – Updated: 2024-08-05 16:19
VLAI
Summary
A Use of Client-Side Authentication issue was discovered in Advantech B+B SmartWorx MESR901 firmware versions 1.5.2 and prior. The web interface uses JavaScript to check client authentication and redirect unauthorized users. Attackers may intercept requests and bypass authentication to access restricted web pages.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Advantech B+B SmartWorx MESR901 Affected: Advantech B+B SmartWorx MESR901
Date Public
2017-05-05 00:00
Show details on NVD website
To clipboard 

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GHSA-28C6-247X-R9MW

Vulnerability from github – Published: 2022-06-22 00:00 – Updated: 2022-06-30 00:00
VLAI
Details

A vulnerability has been identified in SIMATIC WinCC OA V3.16 (All versions in default configuration), SIMATIC WinCC OA V3.17 (All versions in non-default configuration), SIMATIC WinCC OA V3.18 (All versions in non-default configuration). Affected applications use client-side only authentication, when neither server-side authentication (SSA) nor Kerberos authentication is enabled. In this configuration, attackers could impersonate other users or exploit the client-server protocol without being authenticated.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

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GHSA-3J85-7795-MC66

Vulnerability from github – Published: 2025-11-10 06:30 – Updated: 2025-11-10 06:30
VLAI
Details

New Site Server developed by CyberTutor has a Use of Client-Side Authentication vulnerability, allowing unauthenticated remote attackers to modify the frontend code to gain administrator privileges on the website.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3 (Critical)
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
Show details on source website
To clipboard 

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    },
    {
      "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-4R5Q-F55R-9FRX

Vulnerability from github – Published: 2026-04-28 15:30 – Updated: 2026-04-28 15:30
VLAI
Details

mpGabinet performs client-side authentication. An attacker with access to any application instance connected to the backend server can bypass the login verification process by manipulating the application binary and authenticate as an arbitrary user.

This issue affects mpGabinet version 23.12.19 and below.

Severity
8.4 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-40551"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-603"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-28T14:16:13Z",
    "severity": "HIGH"
  },
  "details": "mpGabinet performs client-side authentication. An attacker with access to any application instance connected to the backend server can bypass the login verification process by manipulating the application binary and authenticate as an arbitrary user.  \n\nThis issue affects mpGabinet version 23.12.19 and below.",
  "id": "GHSA-4r5q-f55r-9frx",
  "modified": "2026-04-28T15:30:50Z",
  "published": "2026-04-28T15:30:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40551"
    },
    {
      "type": "WEB",
      "url": "https://cert.pl/posts/2026/04/CVE-2026-40550"
    },
    {
      "type": "WEB",
      "url": "https://www.mpgabinet.pl"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/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-5733-JR78-JP2W

Vulnerability from github – Published: 2026-08-28 00:32 – Updated: 2026-08-28 00:32
VLAI
Details

The affected Ebyte device relies on client-managed authentication tokens without sufficient server-side validation. An attacker may replay or manipulate authentication tokens to gain unauthorized access to administrative functionality.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
8.7 (High)
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
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2026-76945"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-603"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T00:18:15Z",
    "severity": "HIGH"
  },
  "details": "The affected Ebyte device relies on client-managed authentication tokens\n without sufficient server-side validation. An attacker may replay or \nmanipulate authentication tokens to gain unauthorized access to \nadministrative functionality.",
  "id": "GHSA-5733-jr78-jp2w",
  "modified": "2026-08-28T00:32:04Z",
  "published": "2026-08-28T00:32:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76945"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.json"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06"
    }
  ],
  "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-63P9-9P5P-V46F

Vulnerability from github – Published: 2022-05-13 01:36 – Updated: 2022-05-13 01:36
VLAI
Details

A Use of Client-Side Authentication issue was discovered in Advantech B+B SmartWorx MESR901 firmware versions 1.5.2 and prior. The web interface uses JavaScript to check client authentication and redirect unauthorized users. Attackers may intercept requests and bypass authentication to access restricted web pages.

Severity
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2017-7909"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287",
      "CWE-603"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-05-06T00:29:00Z",
    "severity": "CRITICAL"
  },
  "details": "A Use of Client-Side Authentication issue was discovered in Advantech B+B SmartWorx MESR901 firmware versions 1.5.2 and prior. The web interface uses JavaScript to check client authentication and redirect unauthorized users. Attackers may intercept requests and bypass authentication to access restricted web pages.",
  "id": "GHSA-63p9-9p5p-v46f",
  "modified": "2022-05-13T01:36:16Z",
  "published": "2022-05-13T01:36:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7909"
    },
    {
      "type": "WEB",
      "url": "https://ics-cert.us-cert.gov/advisories/ICSA-17-122-03"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/98257"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-757Q-W8XV-793G

Vulnerability from github – Published: 2026-01-03 00:31 – Updated: 2026-01-03 00:31
VLAI
Details

A vulnerability in Nuvation Battery Management System allows Authentication Bypass.This issue affects Battery Management System: through 2.3.9.

Severity
9.3 (Critical)
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/S:P/AU:Y
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2025-64119"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-603"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-02T22:15:44Z",
    "severity": "CRITICAL"
  },
  "details": "A vulnerability in Nuvation Battery Management System allows Authentication Bypass.This issue affects Battery Management System: through 2.3.9.",
  "id": "GHSA-757q-w8xv-793g",
  "modified": "2026-01-03T00:31:26Z",
  "published": "2026-01-03T00:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-64119"
    },
    {
      "type": "WEB",
      "url": "https://www.dragos.com/community/advisories/CVE-2025-64119"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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:P/AU:Y/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-8V4G-559X-QQXM

Vulnerability from github – Published: 2022-05-24 22:28 – Updated: 2026-06-03 15:30
VLAI
Details

Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, A remote, unauthenticated attacker can send a request from the RSLogix 500 software to the victim’s MicroLogix controller. The controller will then respond to the client with used password values to authenticate the user on the client-side. This method of authentication may allow an attacker to bypass authentication altogether, disclose sensitive information, or leak credentials.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2020-6988"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287",
      "CWE-603"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-03-16T16:15:00Z",
    "severity": "MODERATE"
  },
  "details": "Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior, A remote, unauthenticated attacker can send a request from the RSLogix 500 software to the victim\u2019s MicroLogix controller. The controller will then respond to the client with used password values to authenticate the user on the client-side. This method of authentication may allow an attacker to bypass authentication altogether, disclose sensitive information, or leak credentials.",
  "id": "GHSA-8v4g-559x-qqxm",
  "modified": "2026-06-03T15:30:33Z",
  "published": "2022-05-24T22:28:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-6988"
    },
    {
      "type": "WEB",
      "url": "https://www.us-cert.gov/ics/advisories/icsa-20-070-06"
    }
  ],
  "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"
    }
  ]
}
Mitigation
Architecture and Design

Do not rely on client side data. Always perform server side authentication.

No CAPEC attack patterns related to this CWE.

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