Vulnerability · Published Sep 23, 2026 · Assigned by WPScan

CVE-2026-81338MasterStudy LMS < 3.7.50 - Subscriber+ Stored HTML Injection via Course Discussions

Medium 4.6

In plain English

A medium-severity insufficient verification of data authenticity in MasterStudy LMS WordPress Plugin from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).

Severity (CVSS 3.1)4.6Medium

Exploit odds (30 days)0.1%top 98.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not properly sanitise and restrict HTML in user-submitted content before storing it and rendering it to other users, allowing users with subscriber-level accounts and above to perform stored HTML injection, such as embedding iframes, that can be leveraged for phishing and content spoofing against other users viewing the content.

Affected products (as reported)

Vendor	Product	Versions
Unknown	MasterStudy LMS WordPress Plugin	0 – before 3.7.50

Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

References

https://wpscan.com/vulnerability/e8494c71-fb0f-4ab9-a8b7-8db3745a2d9b/ exploit, vdb-entry, technical-description