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CVE-2023-4278

34
FAUCET Score

CVE-2023-4278 is a high-severity vulnerability affecting the MasterStudy LMS WordPress plugin versions prior to 3.0.18. It allows unauthenticated attackers to register as instructors due to insufficient checks during registration. This enables them to create and publish courses or posts, impacting the integrity of the affected website. While not actively exploited in the wild, public exploit code is available, and its high FAUCET Risk Score of 96/100 indicates significant potential for abuse.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.0.18CPE matchmatch criteria
cpe:2.3:a:stylemixthemes:masterstudy_lms:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.50%
Probability of exploitation in next 30 days
EPSS Percentile
87.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-51735 · Oct 9, 2023
This CVE's current EPSS score of 0.0350 is in the 79th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/175007/WordPress-Masterstudy-LMS-3.0.17-Account-Creation.html
wpscan.com / vulnerability/cb3173ec-9891-4bd8-9d05-24fe805b5235
ExploitThird Party Advisory