CVE-2026-82845
Masteriyo LMS < 3.4.1 - Subscriber+ PHP Object Injection
CRITICAL 9.9EPSS 0.6%
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
- Masteriyo LMS
- CVSS v3.1 CNA
- 9.9 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS
- 0.64% chance of exploitation in the next 30 days, 50th percentile
- Published
- 2026-09-12