CVE-2026-11907
Received Received - Intake

Authorization Bypass in WordPress Stream Plugin

Publication date: 2026-08-07

Last updated on: 2026-08-07

Assigner: Wordfence

Description
The Stream plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.2.0. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to access all Stream activity records via the Heartbeat API.

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Meta Information

Published
2026-08-07
Last Modified
2026-08-07
Generated
2026-08-07
AI Q&A
2026-08-07
EPSS Evaluated
N/A
NVD
CVE-2026-11907
EUVD
EUVD-2026-54366

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
stream plugin to 4.2.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

The Stream plugin for WordPress has an authorization bypass vulnerability in versions up to 4.2.0. This flaw allows authenticated users with subscriber-level access or higher to bypass permission checks and access all Stream activity records through the Heartbeat API.

Detection Guidance

Check WordPress plugin versions for Stream plugin up to 4.2.0. Monitor Heartbeat API logs for unauthorized access to Stream activity records by subscriber-level users or above.

Impact Analysis

Attackers could view sensitive activity logs, including user actions, system events, and other confidential data stored by the Stream plugin. This could lead to unauthorized access to private information or enable further attacks.

Compliance Impact

This vulnerability could violate compliance requirements by exposing protected data. GDPR may require breach notification if personal data is accessed, while HIPAA could be violated if protected health information is exposed through unauthorized log access.

Mitigation Strategies

Update the Stream plugin to the latest version beyond 4.2.0. Restrict subscriber-level access to sensitive API endpoints. Review logs for suspicious activity.

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