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TI-2026-76506 Aliases CVE-2026-112329GHSA-32x8-68x9-4hfv

Broken access control in Sensei LMS lets users send private messages

Priority LOW 23CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

The Sensei LMS WordPress plugin before 4.26.4 contains a broken access control flaw (CWE-862) in the legacy save_new_message handler, which checks only a generic nonce. Authenticated users, including Subscribers, can supply an arbitrary post_id to create a private message to that post's author, bypassing the enrollment checks of the newer REST controller.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00196 9th percentileScored 2026-11-07
Fix Fixed Sensei LMS (Automattic): 4.26.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AutomatticSensei LMSbefore 4.26.44.26.4Patch availableCNA
  • Sensei LMS VendorAutomattic Affected before 4.26.4 Fixed in 4.26.4 Patch available CNA

Remediation

Update Sensei LMS to version 4.26.4 or later, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Sensei LMS (Automattic) Fixed in 4.26.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Automattic Sensei LMS 4.26.4

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-76505 Missing authorization in Sensei LMS lets teachers edit other coursesPriority LOW 23
    Show all 2 records →

Timeline

  1. 2026-10-19 Threatist record created from CVE-2026-112329
  2. 2026-10-19 Alias added: GHSA-32x8-68x9-4hfv
  3. 2026-10-22 CISA SSVC decision points changed

References

Patch 1

  • TI-2023-12700 Improper authentication in WooCommerce Payments WordPress Plugin CVSS 3.1CRITICAL 9.8
  • TI-2023-03453 Prototype Pollution in automattic/mongoose CVSS 3.1CRITICAL 9.8
  • TI-2024-06106 Jetpack Boost < 3.4.7 - Admin+ SSRF CVSS 3.1CRITICAL 9.1
  • TI-2013-01782 WordPress W3 Total Cache Plugin 0.9.2.8 has a Remote PHP Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2022-02368 Prototype Pollution in automattic/mongoose CVSS 3.1CRITICAL 9.8
  • TI-2023-02806 Jetpack < 12.1.1 - Author+ Arbitrary File Manipulation via API CVSS 3.1HIGH 8.8
See all 124 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences