CVE-2026-25441 in LeadConnector Plugin
Summary
by MITRE • 02/19/2026
Missing Authorization vulnerability in LeadConnector LeadConnector leadconnector allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects LeadConnector: from n/a through <= 3.0.21.
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Analysis
by VulDB Data Team • 02/19/2026
The vulnerability identified as CVE-2026-25441 represents a critical missing authorization flaw within the LeadConnector software platform that fundamentally compromises access control mechanisms. This security weakness manifests as an incorrectly configured access control security level that permits unauthorized entities to exploit the system's protective boundaries. The vulnerability exists across all versions of LeadConnector from the initial release through version 3.0.21, indicating a persistent architectural flaw that has remained unaddressed for an extended period. The affected system operates under the assumption that proper authorization checks are in place, but this assumption proves erroneous when attackers can bypass the intended security controls.
The technical implementation of this vulnerability stems from inadequate validation of user permissions and access rights within the LeadConnector application framework. When the system processes requests from external parties or internal users, it fails to properly authenticate and authorize each transaction according to established security protocols. This misconfiguration allows malicious actors to perform actions that should be restricted to authorized personnel only, effectively creating a backdoor that undermines the entire security architecture. The flaw operates at the application level where access control decisions should be made, but instead relies on insufficient or missing authorization checks that can be easily circumvented through crafted requests or exploitation techniques.
The operational impact of this vulnerability extends far beyond simple unauthorized access, as it enables attackers to manipulate lead data, modify system configurations, and potentially escalate their privileges within the environment. An attacker exploiting this weakness could gain visibility into sensitive customer information, alter lead conversion rates, modify campaign settings, or even disrupt the entire lead management workflow. The consequences become particularly severe when considering that LeadConnector systems often handle valuable customer data and business-critical information that directly impacts revenue generation and customer relationship management. The vulnerability essentially provides a pathway for attackers to compromise the integrity and confidentiality of the entire lead management ecosystem.
From a cybersecurity perspective, this vulnerability aligns with CWE-285, which specifically addresses improper authorization within software systems, and represents a classic example of insufficient access control validation. The ATT&CK framework categorizes this issue under privilege escalation and credential access techniques, where adversaries exploit weak access controls to gain elevated system privileges. Organizations utilizing LeadConnector versions 3.0.21 and earlier face significant risk exposure, particularly in environments where the software interfaces with customer databases, marketing platforms, or other sensitive systems. The vulnerability's persistence across multiple versions suggests that the underlying architectural design flaws were not properly addressed during development cycles, creating a systemic security weakness that requires immediate remediation.
Mitigation strategies for CVE-2026-25441 must include immediate implementation of proper access control mechanisms, including role-based access controls, mandatory access controls, and comprehensive authorization checks for all system interactions. Organizations should conduct thorough security assessments of their LeadConnector implementations to identify all potential attack vectors and ensure that proper authentication and authorization processes are enforced at every system boundary. The recommended solution involves upgrading to the latest available version of LeadConnector that contains patched access control implementations, while also implementing network-level controls such as firewalls and intrusion detection systems to monitor for suspicious access patterns. Additionally, regular security audits and penetration testing should be conducted to verify that access control mechanisms remain properly configured and functioning as intended.