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Vulnerabilities

Vulnerability · CVE-2026-104736

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

Published Oct 16, 2026 · catalog updated Oct 18, 2026 · LearnPress – WordPress LMS Plugin for Create and Sell Online Courses

Check if you run it

No confirmed exploitation is on record for CVE-2026-104736. EPSS is 0.44%. Act only if a listed version of LearnPress – WordPress LMS Plugin for Create and Sell Online Courses is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.44%
Remediation
Version ranges on file
Affected products
stated LearnPress – WordPress LMS Plugin for Create and Sell Online Courses · vendor thimpress · wordpress learnpress

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated LearnPress – WordPress LMS Plugin for Create and Sell Online Courses<= 4.4.10
  • vendor thimpressversion unspecified
  • wordpress learnpressversion unspecified

How to fix CVE-2026-104736

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-104736. EPSS is 0.44%. Act only if a listed version of LearnPress – WordPress LMS Plugin for Create and Sell Online Courses is installed.

Which versions are affected?

Compare what you have installed with LearnPress – WordPress LMS Plugin for Create and Sell Online Courses <= 4.4.10. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 0.44%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 16, 2026 · Wordfence Intelligence

    Detected

    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:

  2. Oct 17, 2026 · EUVD

    Updated

    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:

  3. Oct 18, 2026 · NIST NVD

    Updated

    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:

Sources

  • CVE.orgVulnerability recordCVE-2026-104736

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-104736

    30-day exploitation probability 0.4%

    first.org
  • EUVDVulnerability recordEUVD-2026-103224

    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()

    euvd.enisa.europa.eu
  • NIST NVDVulnerability recordCVE-2026-104736

    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()

    nvd.nist.gov
  • Wordfence IntelligencePackage advisoryCVE-2026-104736

    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()

    wordfence.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.