Vulnerability · Published Sep 24, 2026 · Assigned by WPScan

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

Medium 4.3

In plain English

A medium-severity authorization bypass via user-controlled key in Masteriyo LMS from Unknown. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.2%top 95.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Unknown	Masteriyo LMS	0 – before 3.4.2

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://wpscan.com/vulnerability/8114501a-3591-4d8c-b73e-a598756d45d7/ exploit, vdb-entry, technical-description