CVE-2026-11907

Stream <= 4.2.0 - Missing Authorization to Authenticated (Subscriber+) Sensitive Information Disclosure via Heartbeat API

Published 7 Aug 2026 • Updated 7 Aug 2026

Severity: MEDIUM

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.

Affected products (1)

• xwp Stream – Activity Log & Audit Trail

Problem types

• CWE-862 Missing Authorization

References (2)

• https://www.wordfence.com/threat-intel/vulnerabilities/id/b7c7e45a-581e-4cf0-83ac-cbca816701f1?source=cve
• https://plugins.trac.wordpress.org/browser/stream/tags/4.2.1/classes/class-live-update.php#L186