CVE-2026-88848 MasterStudy CVE debrief

Who should care

Defenders managing WordPress sites with MasterStudy LMS plugin should assess exposure and prioritize updates to prevent unauthorized course enrollment. Defenders should verify and update plugin versions to prevent unauthorized course enrollment. This issue may impact defenders managing WordPress sites with MasterStudy LMS plugin, as it allows members to bypass course enrollment restrictions.

Why it matters

CVE-2026-88848 allows members to bypass course enrollment restrictions in MasterStudy LMS WordPress plugin, potentially leading to unauthorized access and financial impact. Defenders should verify and update plugin versions, restrict course enrollment, and monitor for unauthorized attempts.

• Potential unauthorized access to restricted courses
• Possible financial impact due to bypassed course enrollment restrictions
• Need for verification of course enrollment controls
• Priority for updating MasterStudy LMS WordPress plugin

Technical summary

The MasterStudy LMS WordPress plugin from version 1.9 to 3.7.50 does not verify course enrollment based on membership plans, allowing members to enroll in restricted paid courses. This issue allows members to bypass course enrollment restrictions, potentially leading to unauthorized access and financial impact. Defenders should verify and update plugin versions to prevent unauthorized course enrollment. The vulnerability allows members to bypass course enrollment restrictions by not verifying membership plans. WPScan reported that the MasterStudy LMS WordPress plugin from version 1.9 to 3.7.50 does not verify course enrollment based on membership plans.

Defensive priority

Defenders should prioritize verifying and updating MasterStudy LMS WordPress plugin versions to prevent unauthorized course enrollment.

Recommended defensive actions

• Verify and update MasterStudy LMS WordPress plugin to version 3.7.50 or later
• Restrict course enrollment based on membership plans
• Monitor for unauthorized course enrollment attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• 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.

Evidence notes

The vulnerability allows members to bypass course enrollment restrictions by not verifying membership plans. This issue was reported by WPScan. WPScan reported that the MasterStudy LMS WordPress plugin from version 1.9 to 3.7.50 does not verify course enrollment based on membership plans. The vulnerability allows members to enroll in restricted paid courses outside their plan.

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.