Improper Restriction of Excessive Authentication Attempts

In affected versions, vulnerability-lookup did not track or limit failed One-Time Password (OTP) attempts during Two-Factor Authentication (2FA) verification. An attacker who already knew or guessed a valid username and password could submit an arbitrary number of OTP codes without causing the account to be locked or generating any specific alert for administrators. This lack of rate-limiting and lockout on OTP failures significantly lowers the cost of online brute-force attacks against 2FA codes and increases the risk of successful account takeover, especially if OTP entropy is reduced (e.g. short numeric codes, user reuse, or predictable tokens). Additionally, administrators had no direct visibility into accounts experiencing repeated 2FA failures, making targeted attacks harder to detect and investigate. The patch introduces a persistent failed_otp_attempts counter on user accounts, locks the user after 5 invalid OTP submissions, resets the counter on successful verification, and surfaces failed 2FA attempts in the admin user list. This enforces an account lockout policy for OTP brute-force attempts and improves monitoring capabilities for suspicious 2FA activity.This issue affects Vulnerability-Lookup: before 2.18.0.Show less

Dell CloudBoost Virtual Appliance, versions 19.13.0.0 and prior, contains an Improper Restriction of Excessive Authentication Attempts vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to unauthorized access.Show less

Medtronic CareLink Network allows an unauthenticated remote attacker to perform a brute force attack on an API endpoint that could be used to determine a valid password under certain circumstances. This issue affects CareLink Network: before December 4, 2025.Show less

An issue was discovered in weijiang1994 university-bbs (aka Blogin) in commit 9e06bab430bfc729f27b4284ba7570db3b11ce84 (2025-01-13). A weak verification code generation mechanism combined with missing rate limiting allows attackers to perform brute-force attacks on verification codes without authentication. Successful exploitation may result in account takeover via password reset or other authentication bypass methods.Show less

Windu CMS implements weak client-side brute-force protection by using parameter loginError. Information about attempt count or timeout is not stored on the server, which allows a malicious attacker to bypass this brute-force protection by resetting this parameter. Only version 4.1 was tested and confirmed as vulnerable. This issue was fixed in version 4.1 build 2250.Show less

CWE-307: Improper Restriction of Excessive Authentication Attempts vulnerability exists that would allow an attacker on the local network to gain access to the user account by performing an arbitrary number of authentication attempts with different credentials on the /REST/shutdownnow endpoint.Show less

Improper Restriction of Excessive Authentication Attempts, Client-Side Enforcement of Server-Side Security, Reliance on Untrusted Inputs in a Security Decision vulnerability in Turkguven Software Technologies Inc. Perfektive allows Brute Force, Authentication Bypass, Functionality Bypass. This issue affects Perfektive: before Version: 12574 Build: 2701.Show less

A vulnerability was identified in LogicalDOC Community Edition up to 9.2.1. This vulnerability affects unknown code of the file /login.jsp of the component Admin Login Page. Such manipulation leads to improper restriction of excessive authentication attempts. The attack can be executed remotely. This attack is characterized by high complexity. It is stated that the exploitability is difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.Show less

Password enumeration vulnerability in Liferay Portal 7.4.0 through 7.4.3.119, and older unsupported versions, and Liferay DXP 2024.Q1.1 through 2024.Q1.5, 2023.Q4.0 through 2023.Q4.10, 2023.Q3.1 through 2023.Q3.10, 7.4 GA through update 92, and older unsupported versions allows remote attackers to determine a user’s password even if account lockout is enabled via brute force attack.Show less

Zitadel is open-source identity infrastructure software. Prior to 4.6.0, 3.4.3, and 2.71.18, an attacker can perform an online brute-force attack on OTP, TOTP, and passwords. While Zitadel allows preventing online brute force attacks in scenarios like TOTP, Email OTP, or passwords using a lockout mechanism. The mechanism is not enabled by default and can cause a denial of service for the corresponding user if enabled. Additionally, the mitigation strategies were not fully implemented in the more recent resource-based APIs. This vulnerability is fixed in 4.6.0, 3.4.3, and 2.71.18.Show less

A security vulnerability has been detected in VirtFusion up to 6.0.2. This vulnerability affects unknown code of the file /account/_settings of the component Email Change Handler. The manipulation leads to improper restriction of excessive authentication attempts. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.Show less