6.8

CVE-2026-82846: unknown masteriyo lms Cross-site Scripting

CVSS: 6.8v3.1MediumDeferred
Published 05-09-2026Last modified 06-09-2026
Open JSON

Vulnerability summary

CVE-2026-82846 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 35.9% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 3.4.0.

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. 05-09-2026
    PublishedVulnerability first disclosed.
  2. 06-09-2026
    Last modifiedVulnerability information updated.

Description

The Masteriyo LMS WordPress plugin before 3.4.0 does not sanitise and escape some course settings before outputting them in a page available to all visitors, allowing users with a course-author role to perform Stored Cross-Site Scripting attacks that run in the session of anyone viewing the course, including a logged-in administrator.

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 19-09-2026

19-09-202619-10-2026
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≥ 1.18.0, ≤ 2.3.3 (fixed in 3.4.0)

2 vendors · 2 products

References

2 links