Compliance Impact

The CVE-2026-39526 vulnerability allows unauthorized users to bypass authorization and authentication controls, potentially granting access to sensitive files, folders, or database interactions.

Such unauthorized access could lead to exposure of sensitive personal or protected health information, which may result in non-compliance with standards and regulations like GDPR and HIPAA that require strict access controls and protection of sensitive data.

Although the vulnerability has a low severity score (5.4) and is unlikely to be exploited with high impact, failure to patch it could increase the risk of data breaches, thereby affecting compliance with these regulations.

Timely updating to version 4.11.2 or later is strongly recommended to mitigate this risk and maintain compliance.

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Executive Summary

CVE-2026-39526 is an Insecure Direct Object References (IDOR) vulnerability in the WordPress WpStream Plugin versions prior to 4.11.2.

This vulnerability allows unauthorized users to bypass authorization and authentication controls by exploiting incorrectly configured access control security levels.

As a result, attackers with as low privilege as a subscriber or developer role can potentially gain access to sensitive files, folders, or database interactions that they should not be able to access.

The issue falls under the OWASP Top 10 category A1: Broken Access Control.

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Impact Analysis

This vulnerability can lead to unauthorized access to sensitive data or resources within the WpStream plugin environment.

Attackers exploiting this flaw can bypass access controls, potentially exposing files, folders, or database information that should be protected.

Although the CVSS severity score is 5.4 (low severity), the vulnerability can be exploited in mass campaigns targeting many websites, regardless of their traffic or popularity.

The required privilege level to exploit this vulnerability is low, increasing the risk of unauthorized access.

Timely updating to version 4.11.2 or later is strongly recommended to mitigate this risk.

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Detection Guidance

The CVE-2026-39526 vulnerability is an Insecure Direct Object References (IDOR) issue in the WordPress WpStream Plugin versions prior to 4.11.2, allowing unauthorized users to bypass authorization controls.

There is no specific information provided about detection methods or commands to identify exploitation attempts or presence of this vulnerability on your network or system.

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Mitigation Strategies

To mitigate this vulnerability, users are strongly advised to update the WordPress WpStream Plugin to version 4.11.2 or later, where the issue has been patched.

Patchstack also offers mitigation solutions such as auto-updates for vulnerable plugins to provide rapid protection.

Since the required privilege level to exploit this vulnerability is as low as a subscriber or developer role, timely updating is critical to prevent unauthorized access.

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