Vulnerability · Published Oct 17, 2026 · Assigned by Wordfence

CVE-2026-104736LearnPress <= 4.4.10 - Unauthenticated PHP Object Injection via 'checkout-email' Parameter

Critical 9.8

In plain English

A critical-severity unsafe deserialization in LearnPress – WordPress LMS Plugin for Create and Sell Online Courses from thimpress. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code.

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)2.5%top 15.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling2Nuclei, Public PoC

Official description

The LearnPress plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 4.4.10 via deserialization of untrusted input from the 'checkout-email' request parameter during the checkout AJAX action. The value is passed through sanitize_text_field(), which does not strip serialized object syntax, then stored in the LearnPress session table and later fed to LP_Helper::maybe_unserialize() → unserialize() (without an allowed_classes restriction) by LP_Session_Handler::get() on subsequent requests. This makes it possible for unauthenticated attackers to inject a PHP Object.

Affected products (as reported)

Vendor	Product	Versions
thimpress	LearnPress – WordPress LMS Plugin for Create and Sell Online Courses	0 – through 4.4.10

Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

In plain English

Official description

Affected products (as reported)

References