MasterStudy LMS registration permits external redirects
MasterStudy LMS before 3.7.43 uses an unauthenticated registration redirect value without validating its destination. An attacker can send users through the registration flow and redirect them to an arbitrary external site.
- Component
- MasterStudy LMS WordPress Plugin
- Plugin slug
masterstudy-lms-learning-management-system- Affected
- < 3.7.43
- Safe version
3.7.43- Published
- Aug 29, 2026
This CVE was published Aug 29, 2026 and is one of 31 known issues for this plugin.
Update, patch or deactivate.
Update to 3.7.43 or later and review registration links and traffic for attacker-controlled external redirect values.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical 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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N