CVE-2026-81338CWE-345

CVE-2026-81338

Medium · published September 23, 2026

CVSS v3.1
4.6
EPSS
0%
Percentile
0.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.6 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00093 · 0.5th percentile
Weakness
CWE-345 · Insufficient Verification of Data Authenticity
Published
2026-09-23T10:17Z
References (1)
https://wpscan.com/vulnerability/e8494c71-fb0f-4ab9-a8b7-8db3745a2d9b/ · [email protected]
EPSS history
Timeline
  • 24 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 23 SEP 06:00Z
    MasterStudy LMS < 3.7.50 - Subscriber+ Stored HTML Injection via Course Discussions
    cvelistv5