CVE-2026-104736 Details
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.
A PHP Object Injection vulnerability has been identified in the LearnPress plugin for WordPress, affecting versions through 4.4.10. The issue arises from the deserialization of untrusted input from the 'checkout-email' parameter during the checkout AJAX action. The vulnerable code sanitizes the input using 'sanitize_text_field()', which fails to remove serialized object syntax. This sanitized input is then stored in the LearnPress session table and later retrieved by the 'LP_Session_Handler::get()' method, which unserializes the data without restricting allowed classes. As a result, unauthenticated attackers can inject PHP objects into the application.
Users are advised to update the LearnPress plugin to version 4.4.11 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 17, 2026CISA-ADP
Assessed Oct 18, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-502 | Deserialization of Untrusted Data | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| LearnPress | <= 4.4.10 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 18, 2026 | CVE Modified | CISA-ADP |
| Oct 17, 2026 | New CVE Received | [email protected] |