by Kastro
Paper/Archive/CVE-2026-82845

CVE-2026-82845

Unknown Masteriyo LMS — Masteriyo LMS < 3.4.1 - Subscriber+ PHP Object Injection

EPSS 0.6%CVSS 9.9
critical.is priorityof 100
40
CVSS 9.9 (ADP)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 50.6.506 × 2010.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

The Masteriyo LMS WordPress plugin before 3.4.1 does not prevent user-supplied values held as metadata from being deserialized when they are read back, allowing users with a minimal account to inject arbitrary PHP objects and, by way of a class shipped in a library bundled with the Masteriyo LMS WordPress plugin before 3.4.1, write and execute arbitrary code on the server. A weaker form of the same issue is reachable without an account and yields an arbitrary file write rather than code execution.

Affected

ProductAffectedFixed inSource
Masteriyo LMS< 3.4.13.4.1CNA

Scores by source

CISA ADP9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

exploitwpscan.com/vulnerability/5ced30ea-8b78-495f-b10c-42b3f10adcb3