CVE-2026-78284
Unauthenticated arbitrary file deletion in MasterStudy LMS plugin.
Is CVE-2026-78284 being exploited?
Not confirmed. CVE-2026-78284 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-78284?
CVE-2026-78284 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-78284?
Yes. A fix has been recorded for CVE-2026-78284. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-78284 affect?
CVE-2026-78284 affects MasterStudy LMS WordPress plugin <= 3.7.42, WordPress sites using MasterStudy LMS. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-78284?
Update MasterStudy LMS to the latest patched version and restrict file permissions.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attackers can delete arbitrary server files via the plugin, causing data loss, site downtime, and potential code loss.
Immediate action required
- affected<= 3.7.42
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.