Medium severity · published Sep 24, 2026
CVE-2026-88847
MasterStudy LMS < 3.7.50 - Subscriber+ Lesson Completion Record Creation
4.3
CVSS
0.1%
EPSS
No
On KEV
Description
The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.50 does not verify that a user is enrolled in a course before recording lesson completions against it, allowing any authenticated user, such as a subscriber, to create course progress records for courses they have no access to.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ML
MasterStudy LMS WordPress Plugin ·
before 3.7.50 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88847
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-88847
wpscan.com
https://wpscan.com/vulnerability/c42e9b3a-5a0d-4e16-b18a-4184c09bcb5a/
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