CVE-2026-112329
Sensei LMS 4.26.4 Broken Access Control via save_new_message
- State
- Published
- Severity
- 5.3 Medium
- Published
- Oct 19, 2026
- Updated
- Oct 27, 2026
- Reserved
- Oct 19, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | 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 | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
Sensei LMSAutomattic |
|
References
- Release Notesrelease-notespatch
- VulnCheck Advisory: Sensei LMS 4.26.4 Broken Access Control via save_new_messagethird-party-advisory
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