CVE-2026-8279 masteriyo CVE debrief

Who should care

Defenders responsible for WordPress installations with the Masteriyo LMS plugin should assess exposure and prioritize patching vulnerable versions to prevent unauthorized data deletion.

Why it matters

The vulnerability allows unauthenticated attackers to delete arbitrary course progress records belonging to any student, impacting data integrity and learner progress tracking.

• Verify and patch vulnerable Masteriyo LMS plugin versions to prevent unauthorized data deletion.
• Implement capability checks for the 'delete_item_permissions_check' function in the CourseProgressItemsController.
• Monitor for unauthorized course progress record deletions.

Technical summary

The Masteriyo LMS plugin for WordPress is vulnerable to unauthorized data deletion due to a missing capability check on the 'delete_item_permissions_check' function in the CourseProgressItemsController. This affects all versions up to and including 2.2.0, enabling unauthenticated attackers to delete arbitrary course progress records belonging to any student. Defenders should prioritize verifying and patching vulnerable Masteriyo LMS plugin versions to prevent unauthorized data deletion. The vulnerability is confirmed in Masteriyo LMS plugin versions up to and including 2.2.0.

Defensive priority

Defenders should prioritize verifying and patching vulnerable Masteriyo LMS plugin versions to prevent unauthorized data deletion.

Recommended defensive actions

• Verify and patch Masteriyo LMS plugin versions up to and including 2.2.0.
• Implement capability checks for the 'delete_item_permissions_check' function in the CourseProgressItemsController.
• Monitor for unauthorized course progress record deletions.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The vulnerability is confirmed in Masteriyo LMS plugin versions up to and including 2.2.0. Official sources and references provided include CVE Program and NVD records, as well as source references from [email protected].

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.