6.8

CVE-2026-82847: unknown masteriyo lms Cross-site Scripting

CVSS: 6.8v3.1MediumDeferred
Published 12-09-2026Last modified 12-09-2026
Open JSON

Vulnerability summary

CVE-2026-82847 is a medium (CVSS 6.8) Cross-site Scripting vulnerability in unknown masteriyo lms. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.8% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 3.4.1.

Overall risk
37/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.43%
0%100%
Low · +0.20 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 12-09-2026
    PublishedVulnerability first disclosed.
  2. 12-09-2026
    Last modifiedVulnerability information updated.

Description

The Masteriyo LMS WordPress plugin before 3.4.1 does not sanitise and escape one of its course fields before outputting it back in the course editor, allowing users with the instructor role to perform Stored Cross-Site Scripting attacks against higher privileged users such as administrators.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

+0.20 pp

From 0.24% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (wpscan.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Unknown1 product
Wordpress1 product
  • learning-management-system< 3.4.1

2 vendors · 2 products

References

2 links