CVE-2026-39721 in Starter Templates Plugin
Summary
by MITRE • 10/05/2026
Missing Authorization vulnerability in Brainstorm Force Starter Templates astra-sites allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Starter Templates: from n/a through 4.7.7.
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Analysis
by VulDB Data Team • 10/05/2026
The identified security flaw resides within the Brainstorm Force Starter Templates plugin, specifically affecting versions ranging from initial releases up to version 4.7.7. This vulnerability is classified as a missing authorization error, which fundamentally represents an insecure direct object reference or broken access control mechanism where the application fails to properly verify that the current user has sufficient privileges to perform specific actions on requested resources. In the context of web applications and WordPress plugins, such flaws typically arise when endpoints or administrative functions do not adequately check session tokens, capability levels, or nonce values before executing sensitive operations. This oversight allows an attacker who is authenticated as a lower-privileged user, such as a subscriber or contributor, to interact with functionality intended exclusively for administrators or higher-level roles. The core technical issue lies in the absence of robust server-side validation that ensures access control policies are strictly enforced at every point of interaction within the plugin's codebase.
From an operational perspective, this vulnerability enables unauthorized users to exploit incorrectly configured security levels by performing actions they should not be permitted to execute. Depending on the specific implementation details of the affected functions, this could range from viewing sensitive configuration data and template settings to modifying site configurations or even executing administrative tasks that alter the website's structure. The impact is particularly severe in multi-user environments where role-based access control is critical for maintaining system integrity. An attacker leveraging this flaw can bypass intended restrictions, leading to potential information disclosure, unauthorized modification of content, or further escalation of privileges if combined with other vulnerabilities. This type of issue directly undermines the principle of least privilege, a cornerstone of secure software design, and exposes organizations to risks associated with insider threats or compromised low-level accounts being used as an entry point for more significant attacks.
This vulnerability aligns closely with CWE-284, which describes Improper Access Control, indicating that the system does not restrict unauthorized access to resources. Furthermore, it maps to MITRE ATT&CK technique T1078, specifically Valid Accounts and potentially T1548 if it involves abuse of trust levels or escalation mechanisms within the application framework. The exploitation vector typically requires a valid user account with at least basic authentication privileges, making social engineering or credential theft a potential precursor step for attackers aiming to leverage this flaw against targeted WordPress installations.
To mitigate this risk, immediate action is required by updating the Brainstorm Force Starter Templates plugin to version 4.7.8 or later, where these access control checks have been properly implemented and validated. Administrators should ensure that all plugins are kept up-to-date with their latest security patches, as developers frequently address such authorization gaps in subsequent releases. Additionally, implementing a Web Application Firewall can provide an additional layer of defense by monitoring for anomalous requests that attempt to access restricted endpoints without proper credentials. Regular audits of user roles and permissions within the WordPress environment should also be conducted to ensure that only necessary privileges are granted to each user account, thereby reducing the attack surface available to potential exploiters seeking to abuse these authorization weaknesses.