CVE-2026-102381 in Majestic Support Plugin
Summary
by MITRE • 10/01/2026
Missing Authorization vulnerability in Ahmad Majestic Support majestic-support allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Majestic Support: from n/a through 1.2.0.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 10/01/2026
The identified security flaw represents a critical failure in access control mechanisms within the Majestic Support application, specifically affecting versions ranging from initial releases up to version 1.2.0. This vulnerability is classified as an improper authorization issue where the software fails to enforce adequate restrictions on authenticated users regarding which resources or functions they are permitted to access. In practical terms, this means that while a user may be successfully authenticated into the system, the application does not properly verify whether that specific user has the requisite privileges to perform certain actions or view sensitive data associated with other accounts or administrative levels. This type of flaw is fundamentally rooted in server-side logic errors where the application relies on client-supplied input for authorization decisions rather than maintaining a secure stateful session context that validates permissions against a centralized access control policy.
From a technical perspective, this vulnerability aligns closely with CWE-284, which describes Improper Access Control, and more specifically often manifests as CWE-639, Authorization Bypass Through User-Controlled Key, if the exploit involves manipulating identifiers to escalate privileges or access unauthorized data. The absence of robust server-side validation allows an attacker who has obtained valid credentials for a low-privilege account to interact with endpoints intended only for administrators or other users. By modifying request parameters such as user IDs, session tokens, or resource keys in HTTP requests, the malicious actor can bypass the application's internal checks. This is particularly dangerous because it does not require complex exploitation techniques beyond basic web interaction manipulation, making it accessible even to attackers with limited technical expertise who utilize standard proxy tools like Burp Suite or OWASP ZAP to intercept and alter traffic between their browser and the server.
The operational impact of this vulnerability is severe due to its potential for privilege escalation and unauthorized data exposure. An attacker can leverage this flaw to assume the identity of higher-privileged users, thereby gaining administrative control over the support platform. This level of access typically allows the modification of system configurations, management of customer tickets, and potentially the execution of commands if integrated with other backend services. Furthermore, since Majestic Support is designed for handling customer inquiries and sensitive communication data, unauthorized access could lead to significant confidentiality breaches. Sensitive personal information belonging to customers or internal company communications stored within the support ticketing system could be exfiltrated, leading to regulatory non-compliance under frameworks such as GDPR or HIPAA depending on the nature of the data handled. The integrity of the support process is also compromised, as an attacker could alter tickets, delete evidence, or inject malicious content into responses provided to legitimate customers.
Mitigation strategies must focus on implementing strict server-side authorization checks for every protected resource and action within the application. Developers should ensure that access control decisions are made based on verified user roles stored securely in session state rather than relying on client-supplied data such as hidden form fields or URL parameters. Implementing a principle of least privilege ensures that users only have access to the minimum resources necessary for their role, reducing the blast radius if an account is compromised. Additionally, regular security testing using both static and dynamic analysis tools can help identify these logic flaws before deployment. For organizations currently running affected versions, immediate patching to version 1.2.1 or later is recommended as it likely contains fixes for this access control deficiency. In the interim, deploying a Web Application Firewall with rulesets tuned to detect abnormal authorization patterns may provide some layer of defense by blocking requests that exhibit signs of privilege escalation attempts until a permanent code fix can be applied.