Medium severity · published Sep 24, 2026
CVE-2026-82850
Masteriyo LMS < 3.4.2 - Subscriber+ Quiz Answer Key Disclosure
4.3
CVSS
0.2%
EPSS
No
On KEV
Description
The Masteriyo LMS WordPress plugin before 3.4.2 does not restrict access to quiz answer keys, allowing any authenticated user, such as a student, to retrieve the correct answers for any quiz on the site, including quizzes in courses they are not enrolled in. The redaction that hides them is applied only to a fixed list of question types, so the answers to every other type are returned in full to anyone able to view the questions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 6% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ML
Masteriyo LMS ·
before 3.4.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82850
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82850
wpscan.com
https://wpscan.com/vulnerability/b26150aa-9220-4eb3-a160-0f5301faacc7/
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