Common Weakness Enumeration
CWE-603
AllowedUse of Client-Side Authentication
Abstraction: Base · Status: Draft
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.
48 vulnerabilities reference this CWE, most recent first.
CVE-2021-43355 (GCVE-0-2021-43355)
Vulnerability from cvelistv5 – Published: 2022-01-21 18:17 – Updated: 2025-04-16 16:46
VLAI
EPSS
VEX
Title
Fresenius Kabi Agilia Connect Infusion System use of client side authentication
Summary
Fresenius Kabi Vigilant Software Suite (Mastermed Dashboard) version 2.0.1.3 allows user input to be validated on the client side without authentication by the server. The server should not rely on the correctness of the data because users might not support or block JavaScript or intentionally bypass the client-side checks. An attacker with knowledge of the service user could circumvent the client-side control and login with service privileges.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-16 15:59 UTC
CWE
- CWE-603 - Use of client side authentication
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.cisa.gov/uscert/ics/advisories/icsma-… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Fresenius Kabi | Vigilant Software Suite (Mastermed Dashboard) |
Affected:
unspecified , < 2.0.1.3
(custom)
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CVE-2020-27266 (GCVE-0-2020-27266)
Vulnerability from cvelistv5 – Published: 2021-01-19 21:17 – Updated: 2024-08-04 16:11
VLAI
EPSS
VEX
Summary
In SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A, a client-side control vulnerability in the insulin pump and its AnyDana-i and AnyDana-A mobile applications allows physically proximate attackers to bypass user authentication checks via Bluetooth Low Energy.
Severity
No CVSS data available.
CWE
- CWE-603 - USE OF CLIENT-SIDE AUTHENTICATION CWE-603
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://us-cert.cisa.gov/ics/advisories/icsma-21-012-01 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | SOOIL Developments Co., Ltd Diabecare RS, AnyDana-i and AnyDana-A |
Affected:
Dana Diabecare RS, AnyDana-i, AnyDana-A All versions prior to 3.0
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CVE-2020-7591 (GCVE-0-2020-7591)
Vulnerability from cvelistv5 – Published: 2020-10-15 18:45 – Updated: 2024-08-04 09:33
VLAI
EPSS
VEX
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
2 references
| URL | Tags |
|---|---|
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| https://us-cert.cisa.gov/ics/advisories/icsa-20-287-06 | x_refsource_MISC |
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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
EPSS
VEX
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)
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
1 reference
| URL | Tags |
|---|---|
| https://www.us-cert.gov/ics/advisories/icsa-20-070-06 | x_refsource_MISC |
Impacted products
1 product
| 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
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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
EPSS
VEX
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
2 references
| URL | Tags |
|---|---|
| https://ics-cert.us-cert.gov/advisories/ICSA-17-122-03 | x_refsource_MISC |
| http://www.securityfocus.com/bid/98257 | vdb-entryx_refsource_BID |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Advantech B+B SmartWorx MESR901 |
Affected:
Advantech B+B SmartWorx MESR901
|
Date Public
2017-05-05 00:00
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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)
{
"affected": [],
"aliases": [
"CVE-2022-33139"
],
"database_specific": {
"cwe_ids": [
"CWE-287",
"CWE-603"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-06-21T13:15:00Z",
"severity": "CRITICAL"
},
"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.",
"id": "GHSA-28c6-247x-r9mw",
"modified": "2022-06-30T00:00:40Z",
"published": "2022-06-22T00:00:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-33139"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-111512.pdf"
},
{
"type": "WEB",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-836027.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:H",
"type": "CVSS_V3"
}
]
}
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)
{
"affected": [],
"aliases": [
"CVE-2025-12868"
],
"database_specific": {
"cwe_ids": [
"CWE-603"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-11-10T04:15:41Z",
"severity": "CRITICAL"
},
"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.",
"id": "GHSA-3j85-7795-mc66",
"modified": "2025-11-10T06:30:25Z",
"published": "2025-11-10T06:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-12868"
},
{
"type": "WEB",
"url": "https://www.twcert.org.tw/en/cp-139-10492-84a10-2.html"
},
{
"type": "WEB",
"url": "https://www.twcert.org.tw/tw/cp-132-10493-bf807-1.html"
}
],
"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"
},
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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"
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]
}
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
{
"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"
}
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}
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
{
"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)
{
"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"
}
]
}
Mitigation
Architecture and Design
Do not rely on client side data. Always perform server side authentication.
No CAPEC attack patterns related to this CWE.