CVE-2024-2409

Q: How do I fix CVE-2024-2409?

Upgrade masterstudy lms to 3.3.2 or later.

Q: Is CVE-2024-2409 being actively exploited?

Not that we know of. CVE-2024-2409 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.83% is the estimated probability that it will be exploited in the next 30 days. That is higher than 55% of all scored CVEs.

Q: How severe is CVE-2024-2409?

CVE-2024-2409 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2024-2409 affect?

Published advisories record a fix for masterstudy lms (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

CRITICAL

9.8

CVSS v3

NVD

Description

The MasterStudy LMS plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.3.1. This is due to insufficient validation checks within the _register_user() function called by the 'wp_ajax_nopriv_stm_lms_register' AJAX action. This makes it possible for unauthenticated attackers to register a user with administrator-level privileges when MasterStudy LMS Pro is installed and the LMS Forms Editor add-on is enabled.

CWE-266

How to fix

Remediation Available

masterstudy lmsNVD

Affected:< 3.3.2Fixed in:3.3.2CVE-2024-2409derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

0.83%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

References

Patch2

Third-Party Advisory1

wordfence.com

Related Vulnerabilities

Other CWE-266 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-28000	Critical	9.8	68%	-	Fix
CVE-2025-27007	Critical	9.8	51%	-	-
CVE-2022-20759	High	8.8	29%	-	Fix
CVE-2025-47539	Critical	9.8	28%	-	Fix
CVE-2024-13106	Medium	5.3	27%	-	-
CVE-2024-3013	Medium	6.3	23%	-	-

Common questions

How do I fix CVE-2024-2409?

Upgrade masterstudy lms to 3.3.2 or later.

Is CVE-2024-2409 being actively exploited?

Not that we know of. CVE-2024-2409 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.83% is the estimated probability that it will be exploited in the next 30 days. That is higher than 55% of all scored CVEs.

How severe is CVE-2024-2409?

CVE-2024-2409 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2024-2409 affect?

Published advisories record a fix for masterstudy lms (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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Markdown

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-08.