CVE-2026-65435 in Leads Plugin
Summary
by MITRE • 07/27/2026
Unauthenticated Broken Access Control in Thrive Leads Version <= 10.9.2 versions.
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Analysis
by VulDB Data Team • 07/27/2026
Thrive Leads version 10.9.2 and earlier contains a critical unauthenticated broken access control vulnerability that allows attackers to bypass authentication mechanisms and gain unauthorized access to sensitive administrative functions. This vulnerability falls under the CWE-284 access control weakness category, specifically representing an improper access control flaw that enables attackers to perform actions they should not be authorized to execute. The issue stems from insufficient validation of user permissions within the application's authentication flow, allowing malicious actors to manipulate API endpoints and access restricted administrative features without proper credentials.
The technical implementation flaw occurs in the application's session management and authorization checks where the system fails to properly verify user identities before granting access to protected resources. Attackers can exploit this weakness by crafting specific requests to administrative endpoints that should require authentication, thereby gaining access to lead management functionalities, configuration settings, and potentially sensitive data stored within the application. This vulnerability aligns with the ATT&CK technique T1078 legitimate credentials, as it allows adversaries to operate with elevated privileges without requiring additional credential compromise.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it can enable full administrative control over the Thrive Leads installation. An attacker could manipulate lead databases, modify application configurations, access customer information, and potentially use the compromised system as a pivot point for further attacks within the network. The vulnerability affects all versions up to 10.9.2, making it particularly concerning given the widespread deployment of these older versions across various organizations. This exposure creates significant risk for businesses relying on the platform for lead generation and customer relationship management.
Organizations should immediately implement mitigations including upgrading to Thrive Leads version 10.9.3 or later, which contains the necessary patches to address the access control flaw. Network segmentation and monitoring of administrative endpoints can provide additional defense-in-depth measures while awaiting the upgrade process. Security teams should also review existing user permissions and implement principle of least privilege configurations to minimize potential impact from any successful exploitation attempts. The vulnerability demonstrates the critical importance of proper access control implementation in web applications and aligns with industry best practices outlined in OWASP Top 10 2021 category A07: Identification and Authentication Failures, emphasizing the need for robust authentication mechanisms throughout application architecture.