CVE-2026-82845: critical vulnerability in Masteriyo LMS
Masteriyo LMS < 3.4.1 - Subscriber+ PHP Object Injection
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
Unknown · Masteriyo LMSpublic PoCs found — 1
cve_referencewpscan.com/vulnerability/5ced30ea-8b78-495f-b10c-42b3f10adcb3/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Masteriyo LMS
In the same product, most dangerous first.
CVE-2026-82847MEDIUMMasteriyo LMS < 3.4.1 - Instructor+ Stored XSS via Course HighlightsEPSS 0.4%CVE-2026-82846MEDIUMMasteriyo LMS 1.18.0 - 2.3.3 - Instructor+ Stored XSS via Course Custom FieldsEPSS 0.4%CVE-2026-13332CRITICALMasteriyo LMS < 2.3.1 - Unauthenticated Arbitrary User Session Termination (Denial of Service)EPSS 0.4%CVE-2026-82848MEDIUMMasteriyo LMS 1.3.1 - 2.3.3 - Unauthenticated Course Enrollment DisclosureEPSS 0.3%CVE-2026-82851LOWMasteriyo LMS 1.14.0 - 3.4.0 - Instructor+ Arbitrary Post Disclosure via IDOREPSS 0.3%CVE-2026-10824MEDIUMMasteriyo LMS < 2.2.1 - Unauthenticated Course Progress Disclosure and DeletionEPSS 0.3%