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CVE-2026-104723— LifterLMS <= 10.2.1 - Authenticated (Custom+) PHP Object Injection via 'custom' Lesson Data

Quick assessment

Affected
lifterlms LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes
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.

WordPress 插件 LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes 在 10.2.1 及以下所有版本中，存在 PHP 对象注入漏洞，该漏洞源于对不受信任输入的反序列化操作。这使得具备自定义级别及以上权限的已认证攻击者能够注入 PHP 对象。 由于受影响软件中不存在已知的 POP（Properties-Oriented Programming，面向属性编程）链，因此除非目标站点上安装了包含 POP 链的其他插件或主题，否则该漏洞本身不会产生

CVSS 8.8 · High EPSS 0.45% · P37

Affected Version Matrix 1

VendorProduct Version RangeStatus
lifterlms LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes ≤ 10.2.1 affected
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I. Basic Information for CVE-2026-104723

Vulnerability Information
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Vulnerability Title
LifterLMS <= 10.2.1 - Authenticated (Custom+) PHP Object Injection via 'custom' Lesson Data
Source: CVE Program / CVE List V5
Vulnerability Description
The LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 10.2.1 via deserialization of untrusted input . This makes it possible for authenticated attackers, with custom-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present. This vulnerability is only exploitable during lesson creation when a temporary lesson ID triggers the custom metadata path, and requires the attacker to hold a role with the edit_course capability, such as Instructor, Instructor's Assistant, LMS Manager, or Administrator.
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
lifterlms LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes 0 ~ 10.2.1 -

II. Public POCs for CVE-2026-104723

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III. Intelligence Information for CVE-2026-104723

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News Coverage for CVE-2026-104723 (1)

IV. Related Vulnerabilities

Same product: LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes
Same vendor: lifterlms
Same weakness: CWE-502

V. Comments for CVE-2026-104723

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