CVE-2026-81338: unknown masterstudy lms wordpress plugin
Vulnerability summary
CVE-2026-81338 is a medium (CVSS 6.3) vulnerability in unknown masterstudy lms wordpress plugin. EPSS estimates a 0.09% chance of exploitation in the next 30 days, higher than 0.5% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 3.7.50.
Timeline
- 23-09-2026PublishedVulnerability first disclosed.
- 23-09-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 version- CVE.orgCNA4.6MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:NDiffers
- NVDNIST4.6MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:NDiffers
EPSS trend
Probability
0.09%
Chance of exploitation in the next 30 days
Percentile
1%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-345Insufficient Verification of Data AuthenticityThe product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.
- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Affected systems
Unknown1 product
- masterstudy lms wordpress plugin< 3.7.50
Wordpress1 product
- masterstudy-lms-learning-management-system≤ 3.7.49 (fixed in 3.7.50)
2 vendors · 2 products