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CVE-2026-82846— Masteriyo LMS 1.18.0 - 2.3.3 - Instructor+ Stored XSS via Course Custom Fields

Quick assessment

Affected
Unknown Masteriyo LMS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Masteriyo LMS WordPress 插件在 3.4.0 版本之前，未对部分课程设置进行清理和转义，就直接在面向所有访客的页面中输出这些设置。这使得拥有“课程作者”角色的用户可以执行存储型跨站脚本（Stored Cross-Site Scripting, XSS）攻击，该攻击将在任何查看该课程的用户的会话中执行，包括已登录的Administrator（管理员）。

AI Predicted 6.1 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2026-82846

Vulnerability Information
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Vulnerability Title
Masteriyo LMS 1.18.0 - 2.3.3 - Instructor+ Stored XSS via Course Custom Fields
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Masteriyo LMS 1.18.0 ~ 3.4.0 -

II. Public POCs for CVE-2026-82846

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III. Intelligence Information for CVE-2026-82846

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Other References for CVE-2026-82846 (1)

Same Patch Batch · Unknown · 2026-09-05 · 34 CVEs total

CVE-2026-77826 RegistrationMagic 5.0.1.8 - 6.0.9.8 - Unauthenticated Authentication Bypass via Missing Fa
CVE-2026-82304 Music Store – WordPress eCommerce < 1.4.5 - Unauthenticated SQLi via paypal-data Handler
CVE-2026-81424 Accept Stripe Payments < 2.1.4 - Unauthenticated Product Substitution via IDOR
CVE-2026-83543 Greenshift < 13.2.0 - Contributor+ SSRF via get-csv-to-json REST Endpoint
CVE-2026-83544 Greenshift < 13.2.0 - Contributor+ Stored XSS via Block Animation customProps Attribute
CVE-2026-81423 Accept Stripe Payments < 2.1.4 - Open Redirect via IPN Handler
CVE-2026-81348 My Private Site < 4.2.3 - Unauthenticated Sensitive Information Exposure via RSS Feeds and
CVE-2026-81404 IPGP Visitors Origin < 1.6 - Reflected XSS
CVE-2026-78362 SEO Flow by LupsOnline 3.0.0 - 3.0.2 - Unauthenticated Privilege Escalation via API Key Au
CVE-2026-84021 Bold Page Builder < 5.9.8 - Contributor+ Stored XSS via bt_bb_button/bt_bb_headline/bt_bb_
CVE-2026-78149 Post Carousel 4.0.0 - 4.0.7 - Unauthenticated Password-Protected Post Content and post_pas
CVE-2026-78150 Post Carousel 4.0.0 - 4.0.7 - Contributor+ Private and Protected Post Content Disclosure v
CVE-2026-19861 JetFormBuilder < 3.6.5.2 - Unauthenticated Stored XSS via WYSIWYG Field in Notification Em
CVE-2026-15247 Search Atlas SEO < 2.6.24 - Subscriber+ Google Service Account Credential Overwrite/Deleti
CVE-2026-19858 JetFormBuilder < 3.6.5.2 - Unauthenticated Password Hash and Arbitrary Metadata Disclosure
CVE-2025-15694 Joli Table Of Contents 2.0.0 - 2.8.0 - Admin+ Stored XSS
CVE-2025-15693 JCH Optimize 4.2.1 - 5.0.0 - Admin+ Path Traversal
CVE-2026-84937 YT Player < 2.1.0 - Contributor+ SQLi via ytp_ajax
CVE-2026-84022 Bold Page Builder < 5.9.8 - Contributor+ Stored XSS via Multiple Shortcode Element Attribu
CVE-2026-84221 Kirki 6.0.0 - 6.2.5 - Editor+ SQLi via Content Manager Field ID

Showing top 20 of 34 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Masteriyo LMS
Same vendor: Unknown

V. Comments for CVE-2026-82846

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