Medium severity · published Aug 29, 2026
CVE-2026-81342
MasterStudy LMS < 3.7.43 - Unauthenticated Open Redirect
4.7
CVSS
0.3%
EPSS
No
On KEV
Description
The MasterStudy LMS WordPress Plugin WordPress plugin before 3.7.43 does not validate a redirect parameter supplied during user registration before using it, allowing unauthenticated attackers to redirect users to arbitrary external URLs.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% 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 3.7.43 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-81342
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-81342
wpscan.com
https://wpscan.com/vulnerability/f6f89b50-3087-4fb6-ba12-93fdc1bcc9ed/
More from MasterStudy LMS WordPress Plugin
7.2
CVE-2026-88843
MasterStudy LMS 3.5.29 - < 3.7.50 - Contributor+ LFI via Elementor Courses Categories Widget
5.3
CVE-2026-88846
MasterStudy LMS 2.3.0 - < 3.7.50 - Unauthenticated Account Creation with Registration Disabled
5.3
CVE-2026-81199
MasterStudy LMS < 3.7.46 - Unauthenticated Student Statistics Disclosure via student/stats REST Route
5.3
CVE-2026-81197
MasterStudy LMS < 3.7.46 - Unauthenticated Unpublished Course Title Disclosure via course-list REST Route
5.3
CVE-2026-81195
MasterStudy LMS < 3.7.46 - Unauthenticated Student Enrollment Disclosure via student-courses REST Route