CVE-2026-104736
LearnPress <= 4.4.10 - Unauthenticated PHP Object Injection via 'checkout-email' Parameter
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.
INFO
Published Date :
Oct. 17, 2026, 4:16 a.m.
Last Modified :
Oct. 17, 2026, 4:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | MITRE-CVE | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update LearnPress plugin to the latest version.
- Apply vendor patches for LearnPress if available.
- Review deserialization handling in custom code.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-104736.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-104736 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-104736
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-104736 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-104736 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Oct. 17, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-502 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/104xxx/CVE-2026-104736.json">CVE-2026-104736</a> Added Reference https://plugins.trac.wordpress.org/browser/learnpress/tags/4.4.9.1/inc/class-lp-ajax.php#L21 Added Reference https://plugins.trac.wordpress.org/browser/learnpress/tags/4.4.9.1/inc/class-lp-checkout.php#L377 Added Reference https://plugins.trac.wordpress.org/browser/learnpress/tags/4.4.9.1/inc/class-lp-checkout.php#L523 Added Reference https://plugins.trac.wordpress.org/browser/learnpress/tags/4.4.9.1/inc/class-lp-session-handler.php#L373 Added Reference https://plugins.trac.wordpress.org/changeset?reponame=&old=3750024%40learnpress&new=3750024%40learnpress Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/3e28e008-0ec1-4262-9ac0-6170cf8b8bdf?source=cve