TI-2026-70248 Aliases CVE-2026-104723 GHSA-5m5m-xm33-gpq9

PHP object injection in LifterLMS via custom lesson data

MEDIUM 40CWE-502Published 2026-10-10 · Updated 2026-10-11

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

Summary

LifterLMS, a WordPress learning management plugin, is affected in all versions up to and including 10.2.1. It deserializes untrusted input, which lets an attacker inject a PHP object (CWE-502). An authenticated user with the edit_course capability, such as an Instructor, can exploit this during lesson creation. No known POP chain exists in the plugin, so the impact depends on another installed plugin or theme that provides one, which could allow file deletion, data retrieval or code execution.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00434 37th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
chrisbadgett	LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes	up to 10.2.1	—	No fix listed	CNA

LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes Vendorchrisbadgett Affected up to 10.2.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for LifterLMS.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Timeline

2026-10-10 Threatist record created from CVE-2026-104723
2026-10-10 Alias added: GHSA-5m5m-xm33-gpq9
2026-10-11 Priority changed: MEDIUM → LOW
2026-10-11 CISA SSVC decision points changed
2026-10-11 Priority changed: LOW → MEDIUM

References

Other 6

TI-2024-12660 LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes < 8.0.1 - Reflected XSS CVSS 3.1MEDIUM 6.1
TI-2019-11948 An issue was discovered in the LifterLMS plugin through 3.34.5 for WordPress. CVSS 3.1CRITICAL 9.8
TI-2020-04909 LifterLMS Wordpress plugin version below 3.37.15 is vulnerable to arbitrary file write leading to remote code execution CVSS 3.1CRITICAL 9.8
TI-2025-32767 WordPress LifterLMS plugin <= 8.0.6 - SQL Injection Vulnerability CVSS 3.1CRITICAL 9.8
TI-2024-04416 LifterLMS – WordPress LMS Plugin for eLearning <= 7.6.2 - Authenticated (Contributor+) SQL Injection via Shortcode CVSS 3.1HIGH 8.8
TI-2025-10932 Improper privilege management in chrisbadgett LifterLMS – WP LMS for eLearning, Online… CVSS 3.1HIGH 8.8

See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences