The Sensei LMS WordPress plugin before 4.26.4 contains a broken access control vulnerability in the legacy save_new_message handler hooked on the init action, which validates only a generic nonce without verifying course enrollment or restricting post_id to valid post types. Authenticated attackers, including unprivileged Subscribers, can supply an arbitrary post_id for any course, lesson, or quiz to create a private message addressed to that post's author, bypassing the enrollment checks enforced by the newer REST send-message controller.
Advisories

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Fixes

Solution

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Workaround

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History

Mon, 19 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
Description The Sensei LMS WordPress plugin before 4.26.4 contains a broken access control vulnerability in the legacy save_new_message handler hooked on the init action, which validates only a generic nonce without verifying course enrollment or restricting post_id to valid post types. Authenticated attackers, including unprivileged Subscribers, can supply an arbitrary post_id for any course, lesson, or quiz to create a private message addressed to that post's author, bypassing the enrollment checks enforced by the newer REST send-message controller.
Title Sensei LMS 4.26.4 Broken Access Control via save_new_message
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-19T14:45:24.844Z

Reserved: 2026-10-19T14:41:46.700Z

Link: CVE-2026-112329

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-19T15:17:06.420

Modified: 2026-10-19T15:17:06.420

Link: CVE-2026-112329

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-19T16:45:16Z

Weaknesses