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  4. CVE 2026 82846 masteriyo lms 1180 233 instructor stored xss via
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Back to active CVEs
Medium · CVSS 6.8CVE-2026-82846

Masteriyo LMS 1.18.0 - 2.3.3 - Instructor+ Stored XSS via Course Custom FieldsCVE-2026-82846

Answer in brief

CVE-2026-82846 records a Medium severity (CVSS 6.8) vulnerability in Masteriyo LMS 1.18.0 - 2.3.3 - Instructor+ Stored XSS via Course Custom Fields. The current sources do not mark it as known exploited. The current feed maps Unknown/Masteriyo LMS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 5, 2026Updated Sep 8, 2026Source checked Oct 20, 2026First seen by HOL Sep 5, 2026Material review Sep 8, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Unknown/Masteriyo LMS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Unknown/Masteriyo LMSgeneric>=1.18.0 <3.4.03.4.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Unknown/Masteriyo LMS.
  2. 2Review the reported fix. Update Unknown/Masteriyo LMS to 3.4.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 5, 2026

Sources and claim methodology

  • Source referencewpscan.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Cross-Site Scripting in extension "TYPO3 Fluid-Form by coding.ms" (fluid_form)Also CWE-79
  • Possible DOM XSS in SNS Web Administration PortalAlso CWE-79
  • Multiple vulnerabilities in FacturaScriptsAlso CWE-79
  • Multiple vulnerabilities in FacturaScriptsAlso CWE-79
  • DiviGear Carousel <= 5.2.0 - Authenticated (Subscriber+) Stored Cross-Site Scripting via update_license AJAX ActionAlso CWE-79

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 20, 2026
References
1 linked source
Open source record