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Common Weakness Enumeration

CWE-307

Allowed

Improper Restriction of Excessive Authentication Attempts

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.

1008 vulnerabilities reference this CWE, most recent first.

CVE-2020-37228 (GCVE-0-2020-37228)

Vulnerability from cvelistv5 – Published: 2026-05-16 15:25 – Updated: 2026-05-18 17:53
VLAI
Title
iDS6 DSSPro Digital Signage System 6.2 CAPTCHA Security Bypass
Summary
iDS6 DSSPro Digital Signage System 6.2 contains a CAPTCHA security bypass vulnerability that allows attackers to bypass authentication by requesting the autoLoginVerifyCode object. Attackers can retrieve valid CAPTCHA codes via the login endpoint and use them to perform brute-force attacks against user accounts.
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
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-18 17:39 UTC
CWE
  • CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
Impacted products
Date Public
2020-07-16 00:00
Credits
LiquidWorm as Gjoko Krstic of Zero Science Lab
Show details on NVD website
To clipboard 

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CVE-2020-28212 (GCVE-0-2020-28212)

Vulnerability from cvelistv5 – Published: 2020-11-19 21:03 – Updated: 2024-08-04 16:33
VLAI
Summary
A CWE-307: Improper Restriction of Excessive Authentication Attempts vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause unauthorized command execution when a brute force attack is done over Modbus.
Severity
No CVSS data available.
CWE
  • CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
Impacted products
Vendor Product Version
n/a PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) Affected: PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions)
Show details on NVD website
To clipboard 

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CVE-2020-25196 (GCVE-0-2020-25196)

Vulnerability from cvelistv5 – Published: 2020-12-23 14:08 – Updated: 2024-09-17 00:37
VLAI
Title
MOXA NPort IAW5000A-I/O Series
Summary
The built-in WEB server for MOXA NPort IAW5000A-I/O firmware version 2.1 or lower allows SSH/Telnet sessions, which may be vulnerable to brute force attacks to bypass authentication.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
Impacted products
Vendor Product Version
MOXA NPort IAW5000A-I/O Affected: unspecified , ≤ Version 2.1 (custom)
Create a notification for this product.
Date Public
2020-10-13 00:00
Credits
Evgeniy Druzhinin and Ilya Karpov of Rostelecom-Solar reported these vulnerabilities to CISA
Show details on NVD website
To clipboard 

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CVE-2020-15786 (GCVE-0-2020-15786)

Vulnerability from cvelistv5 – Published: 2020-09-09 18:11 – Updated: 2026-06-02 19:01
VLAI
Summary
A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions < V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions <= V16), SIMATIC HMI Mobile Panels (All versions <= V16), SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 19:01 UTC
CWE
  • CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2020-14484 (GCVE-0-2020-14484)

Vulnerability from cvelistv5 – Published: 2020-07-20 14:45 – Updated: 2024-08-04 12:46
VLAI
Summary
OpenClinic GA versions 5.09.02 and 5.89.05b may allow an attacker to bypass the system’s account lockout protection, which may allow brute force password attacks.
Severity
No CVSS data available.
CWE
  • CWE-307 - IMPROPER RESTRICTION OF EXCESSIVE AUTHENTICATION ATTEMPTS CWE-307
Assigner
References
Impacted products
Vendor Product Version
n/a OpenClinic GA Affected: Versions 5.09.02 and 5.89.05b
Show details on NVD website
To clipboard 

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CVE-2020-11052 (GCVE-0-2020-11052)

Vulnerability from cvelistv5 – Published: 2020-05-07 20:25 – Updated: 2024-08-04 11:21
VLAI
Title
Improper Restriction of Excessive Authentication Attempts in Sorcery
Summary
In Sorcery before 0.15.0, there is a brute force vulnerability when using password authentication via Sorcery. The brute force protection submodule will prevent a brute force attack for the defined lockout period, but once expired, protection will not be re-enabled until a user or malicious actor logs in successfully. This does not affect users that do not use the built-in brute force protection submodule, nor users that use permanent account lockout. This has been patched in 0.15.0.
Severity
8.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
CWE
  • CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
Impacted products
Vendor Product Version
Sorcery Sorcery Affected: < 0.15.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2020-10285 (GCVE-0-2020-10285)

Vulnerability from cvelistv5 – Published: 2020-07-15 21:00 – Updated: 2024-09-17 02:32
VLAI
Title
RVD#3322: Weak authentication implementation make the system vulnerable to a brute-force attack over adjacent networks
Summary
The authentication implementation on the xArm controller has very low entropy, making it vulnerable to a brute-force attack. There is no mechanism in place to mitigate or lockout automated attempts to gain access.
Severity
9.4 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
uFactory xArm5 Lite, xArm 6 and xArm 7 Affected: v1.5.0 and before
Create a notification for this product.
Date Public
2020-07-15 00:00
Credits
Alfonso Glera (Alias Robotics)
Show details on NVD website
To clipboard 

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            "baseScore": 8.3,
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CVE-2020-8202 (GCVE-0-2020-8202)

Vulnerability from cvelistv5 – Published: 2020-07-30 12:53 – Updated: 2024-08-04 09:56
VLAI
Summary
Improper check of inputs in Nextcloud Preferred Providers app v1.6.0 allowed to perform a denial of service attack when using a very long password.
Severity
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a Nextcloud Preferred Providers Affected: 1.7.0
Show details on NVD website
To clipboard 

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CVE-2020-7525 (GCVE-0-2020-7525)

Vulnerability from cvelistv5 – Published: 2020-08-31 16:12 – Updated: 2024-08-04 09:33
VLAI
Summary
Improper Restriction of Excessive Authentication Attempts vulnerability exists in all hardware versions of spaceLYnk and Wiser for KNX (formerly homeLYnk) which could allow an attacker to guess a password when brute force is used.
Severity
No CVSS data available.
CWE
  • CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
Impacted products
Vendor Product Version
n/a All hardware versions of spaceLYnk and Wiser for KNX (formerly homeLYnk) Affected: All hardware versions of spaceLYnk and Wiser for KNX (formerly homeLYnk)
Show details on NVD website
To clipboard 

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CVE-2020-7508 (GCVE-0-2020-7508)

Vulnerability from cvelistv5 – Published: 2020-06-16 19:44 – Updated: 2024-08-04 09:33
VLAI
Summary
A CWE-307 Improper Restriction of Excessive Authentication Attempts vulnerability exists in Easergy T300 (Firmware version 1.5.2 and older) which could allow an attacker to gain full access by brute force.
Severity
No CVSS data available.
CWE
  • CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
Impacted products
Vendor Product Version
n/a Easergy T300 (Firmware version 1.5.2 and older) Affected: Easergy T300 (Firmware version 1.5.2 and older)
Show details on NVD website
To clipboard 

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Mitigation
Architecture and Design
  • Common protection mechanisms include:
  • Disconnecting the user after a small number of failed attempts
  • Implementing a timeout
  • Locking out a targeted account
  • Requiring a computational task on the user's part.
Mitigation MIT-4
Architecture and Design

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 [REF-1482].
  • Consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator. [REF-45]
CAPEC-16: Dictionary-based Password Attack

An attacker tries each of the words in a dictionary as passwords to gain access to the system via some user's account. If the password chosen by the user was a word within the dictionary, this attack will be successful (in the absence of other mitigations). This is a specific instance of the password brute forcing attack pattern.

Dictionary Attacks differ from similar attacks such as Password Spraying (CAPEC-565) and Credential Stuffing (CAPEC-600), since they leverage unknown username/password combinations and don't care about inducing account lockouts.

CAPEC-49: Password Brute Forcing

An adversary tries every possible value for a password until they succeed. A brute force attack, if feasible computationally, will always be successful because it will essentially go through all possible passwords given the alphabet used (lower case letters, upper case letters, numbers, symbols, etc.) and the maximum length of the password.

CAPEC-560: Use of Known Domain Credentials

An adversary guesses or obtains (i.e. steals or purchases) legitimate credentials (e.g. userID/password) to achieve authentication and to perform authorized actions under the guise of an authenticated user or service.

CAPEC-565: Password Spraying

In a Password Spraying attack, an adversary tries a small list (e.g. 3-5) of common or expected passwords, often matching the target's complexity policy, against a known list of user accounts to gain valid credentials. The adversary tries a particular password for each user account, before moving onto the next password in the list. This approach assists the adversary in remaining undetected by avoiding rapid or frequent account lockouts. The adversary may then reattempt the process with additional passwords, once enough time has passed to prevent inducing a lockout.

CAPEC-600: Credential Stuffing

An adversary tries known username/password combinations against different systems, applications, or services to gain additional authenticated access. Credential Stuffing attacks rely upon the fact that many users leverage the same username/password combination for multiple systems, applications, and services.

CAPEC-652: Use of Known Kerberos Credentials

An adversary obtains (i.e. steals or purchases) legitimate Kerberos credentials (e.g. Kerberos service account userID/password or Kerberos Tickets) with the goal of achieving authenticated access to additional systems, applications, or services within the domain.

CAPEC-653: Use of Known Operating System Credentials

An adversary guesses or obtains (i.e. steals or purchases) legitimate operating system credentials (e.g. userID/password) to achieve authentication and to perform authorized actions on the system, under the guise of an authenticated user or service. This applies to any Operating System.

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