CVE-2026-118090— WordPress MasterStudy LMS plugin <= 3.7.55 - PHP Object Injection vulnerability

Quick assessment

Affected

Stylemix MasterStudy LMS

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MasterStudy LMS 3.7.55 及以下版本存在订阅者 PHP 对象注入漏洞。

CVSS 8.8 · High Updated Oct 31, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
Stylemix	MasterStudy LMS	`n/a≤ 3.7.55`	affected

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

WordPress MasterStudy LMS plugin <= 3.7.55 - PHP Object Injection vulnerability

Source: CVE Program / CVE List V5

Vulnerability Description

Subscriber PHP Object Injection in MasterStudy LMS <= 3.7.55 versions.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

可信数据的反序列化

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Stylemix	MasterStudy LMS	n/a ~ 3.7.55	-

II. Public POCs for CVE-2026-118090

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-118090

请登录查看更多情报信息。

Other References for CVE-2026-118090 (1)

https://patchstack.com/database/wordpress/plugin/masterstudy-lms-learning-management-system/vulnerability/wordpress-masterstudy-lms-plugin-3-7-55-php-object-injection-vulnerability?_s_id=cve vdb-entry

https://www.cve.org/CVERecord?id=CVE-2026-118090

IV. Related Vulnerabilities

Same product: MasterStudy LMS

Same vendor: Stylemix

Same weakness: CWE-502