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CVE-2026-82849— Masteriyo LMS < 3.4.2 - Subscriber+ Arbitrary User Course Progress Disclosure via IDOR

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 插件在 3.4.2 版本之前存在一个安全漏洞，该漏洞未能验证发起请求的用户是否拥有其所返回的“课程进度”记录的所有权。因此，任何经过身份认证的用户（例如自行注册的订阅者）都可以读取其他用户的学习活动信息。 该插件在执行所有权检查时，存在一个逻辑缺陷：当请求所指定的账户名称参数未被设置为非零值时，该所有权检查会被跳过，从而导致一次性返回网站上所有学习者的记录。

AI Predicted 4.3 Difficulty: Easy EPSS 0.16% · P5
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I. Basic Information for CVE-2026-82849

Vulnerability Information
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Vulnerability Title
Masteriyo LMS < 3.4.2 - Subscriber+ Arbitrary User Course Progress Disclosure via IDOR
Source: CVE Program / CVE List V5
Vulnerability Description
The Masteriyo LMS WordPress plugin before 3.4.2 does not verify that the user making the request owns the course-progress records being returned, allowing any authenticated user, such as a self-registered subscriber, to read another user's learning activity. The ownership check it applies is skipped whenever the requested account is not named with a non-zero value, in which case the records of every learner on the site are returned at once.
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 0 ~ 3.4.2 -

II. Public POCs for CVE-2026-82849

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III. Intelligence Information for CVE-2026-82849

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Other References for CVE-2026-82849 (1)

Same Patch Batch · Unknown · 2026-09-24 · 16 CVEs total

CVE-2026-93662 Events Manager 7.4.1 - 7.4.4 - Subscriber+ Unpublished Event and Location Disclosure via '
CVE-2026-93661 Events Manager < 7.4.5 - Contributor+ Arbitrary Ticket Overwrite via IDOR
CVE-2026-88847 MasterStudy LMS < 3.7.50 - Subscriber+ Lesson Completion Record Creation
CVE-2026-89004 WPeMatico RSS Feed Fetcher < 2.8.26 - Contributor+ Campaign Configuration and Log Disclosu
CVE-2026-89005 WPeMatico RSS Feed Fetcher < 2.8.26 - Contributor+ Stored XSS via Word to Category
CVE-2026-89002 WPeMatico RSS Feed Fetcher < 2.8.26 - Contributor+ Stored XSS via Campaign Item Preview
CVE-2026-88843 MasterStudy LMS 3.5.29 - < 3.7.50 - Contributor+ LFI via Elementor Courses Categories Widg
CVE-2026-88846 MasterStudy LMS 2.3.0 - < 3.7.50 - Unauthenticated Account Creation with Registration Disa
CVE-2026-88845 MasterStudy LMS 2.3.0 - < 3.7.50 - Subscriber+ Course and Lesson Creation via Demo Import
CVE-2026-82195 10Web Booster < 2.34.0 - Unauthenticated Connection Secret Disclosure and Deletion
CVE-2026-82850 Masteriyo LMS < 3.4.2 - Subscriber+ Quiz Answer Key Disclosure
CVE-2026-84151 The Post Grid < 7.9.5 - Contributor+ Stored HTML/iframe Injection via wp_kses_post Allow-L
CVE-2026-74991 WPForms Lite 1.8.8.2 - 2.0.1.1 - Unauthenticated Stripe Refund and Subscription Cancellati
CVE-2026-80338 CMB2 < 2.13.0 - Subscriber+ Arbitrary Option Corruption via oEmbed Handler
CVE-2026-80513 wpForo Forum < 3.1.6 - Subscriber+ PHP Object Injection via Profile Fields

IV. Related Vulnerabilities

Same product: Masteriyo LMS
Same vendor: Unknown

V. Comments for CVE-2026-82849

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