ThimPress LearnPress Plugin up to 4.3.6 on WordPress archive-course return_type authorization

Summaryinfo

A vulnerability, which was classified as problematic, has been found in ThimPress LearnPress Plugin up to 4.3.6 on WordPress. This affects an unknown part of the file /wp-json/lp/v1/courses/archive-course. The manipulation of the argument return_type leads to authorization. This vulnerability is documented as CVE-2026-8502. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in ThimPress LearnPress Plugin up to 4.3.6 on WordPress and classified as problematic. This issue affects an unknown functionality of the file /wp-json/lp/v1/courses/archive-course. The manipulation of the argument return_type with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. The summary by CVE is:

The LearnPress – WordPress LMS Plugin for Create and Sell Online Courses plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 4.3.6 via the 'return_type' parameter. This makes it possible for unauthenticated attackers to extract sensitive data including the plaintext post_password of password-protected courses and the full post_content, post_author, and post_name of unpublished draft, private, and pending courses via the unrestricted SELECT * fallback query. Exploitation requires supplying both c_status=all (to bypass the publish-only post_status WHERE clause) and return_type=json (to prevent the safe DISTINCT(ID) AS ID field override) in a single unauthenticated request to the /wp-json/lp/v1/courses/archive-course endpoint.

The weakness was released by Jamshed Yergashvoyev. The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-8502 since 05/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

Upgrading to version 4.3.2.8 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• ThimPress

Name

• LearnPress Plugin

Version

• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.3.5
• 4.3.6

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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