TI-2026-76006 Aliases CVE-2026-104736 GHSA-xchc-mccm-x286

PHP object injection in LearnPress WordPress LMS plugin

MEDIUM 54CWE-502Published 2026-10-17 · Updated 2026-10-18

Key facts

Attack vector: Network
Privileges required: None
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

The LearnPress WordPress LMS plugin up to and including 4.4.10 is affected. Untrusted data from the checkout-email request parameter is stored in the session table and later unserialized without a class restriction, which is CWE-502 (deserialization of untrusted data). An unauthenticated remote attacker can inject a PHP object through this parameter.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.02524 84th 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: Yes
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
ThimPress	LearnPress – WordPress LMS Plugin for Create and Sell Online Courses	up to 4.4.10	—	No fix listed	CNA

LearnPress – WordPress LMS Plugin for Create and Sell Online Courses VendorThimPress Affected up to 4.4.10 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:thimpress:learnpress::::::::	—	—	ThimPress

cpe:2.3:a:thimpress:learnpress:*:*:*:*:*:*:*:* Versions — — ·ThimPress

Remediation

The sources list no fixed version for LearnPress.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-18 Threatist record created from CVE-2026-104736
2026-10-18 Alias added: GHSA-xchc-mccm-x286
2026-10-25 EPSS moved to the 50th–90th percentile

References

Other 6

TI-2024-07900 LearnPress – WordPress LMS Plugin <= 4.2.7 - Unauthenticated SQL Injection via 'c_only_fields' CVSS 3.1CRITICAL 10.0
TI-2023-06018 LearnPress <= 4.2.5.7 - Unauthenticated SQL Injection via order_by CVSS 3.1CRITICAL 9.8
TI-2023-05199 WP Hotel Booking < 2.0.8 - Unauthenticated SQLi CVSS 3.1CRITICAL 9.8
TI-2024-04124 LearnPress – WordPress LMS Plugin <= 4.2.6.5 - Unauthenticated Time-Based SQL Injection CVSS 3.1CRITICAL 9.8
TI-2023-18355 WordPress LearnPress plugin <= 4.2.3 - Authenticated Broken Access Control vulnerability CVSS 3.1HIGH 8.8
TI-2022-03105 LearnPress < 4.1.7.2 - Unauthenticated PHP Object Injection via REST API CVSS 3.1HIGH 8.1

See all 155 →

Sources

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