LearnPress <= 4.4.1 - Missing Authorization to Unauthenticated Sensitive Information Exposure via /lp/v1/users/check-answer and /start-quiz REST Endpoints
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, 4.4.1 via the check_answer. This makes it possible for unauthenticated attackers to extract the correct-answer markers, full option lists, explanations, and question content for any quiz question on the site — including questions belonging to paid courses the attacker is not enrolled in.
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LearnPress – WordPress LMS Plugin for Create and Sell Online Courses should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- up to and including 4.4.1
Fixed versions
- 4.4.2
How to fix it
LearnPress – WordPress LMS Plugin for Create and Sell Online Courses is affected by CVE-2026-13765, a missing authorization flaw in its quiz REST endpoints. An unauthenticated attacker can read quiz questions, answers, explanations, and paid-course material. Update LearnPress – WordPress LMS Plugin for Create and Sell Online Courses to 4.4.2 or a newer vendor-supported patched release. Prioritize internet-facing and shared production systems first.
- Inventory every LearnPress – WordPress LMS Plugin for Create and Sell Online Courses deployment, version, exposed endpoint, environment, and owner.
- Confirm the installed release is not an affected version up to and including 4.4.1.
- Update LearnPress – WordPress LMS Plugin for Create and Sell Online Courses to 4.4.2 or a newer vendor-supported patched release.
- Until the update is complete, disable LearnPress or block unauthenticated access to /lp/v1/users/check-answer and the quiz start endpoint.
- Review relevant logs and search access logs for question ID enumeration and repeated calls to the affected quiz routes.
- Replace exposed quiz questions or answers, invalidate affected exams, and notify course owners if private course material was accessed.
- Clear WordPress, object, page, CDN, and browser caches, then update the asset inventory and close any temporary controls only after validation.
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Verify the fix
- Confirm LearnPress – WordPress LMS Plugin for Create and Sell Online Courses is on the patched version or mitigation stated above and record the exact deployed version.
- Confirm an unauthenticated request can no longer read answers or question details from the affected REST routes.
- Confirm the affected WordPress REST, AJAX, form, shortcode, upload, export, or admin feature is available only to the roles and requests that need it.
- Review logs after remediation for continued exploit attempts or signs that the issue was used before the fix.
- Rerun the relevant dependency, platform, vendor, or Fixnx security check and document the result, affected assets, change record, and cleanup evidence for CVE-2026-13765.
Related categories
Related security risks
More published guidance from the same primary category.
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Updated July 24, 2026
highCVE-2026-65500 Manual - Documentation, Knowledge Base & Education WordPress Theme vulnerability
Updated July 24, 2026
mediumKirki <= 6.0.14 - Insecure Direct Object Reference to Unauthenticated Sensitive Information Disclosure via 'context' Parameter
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Trusted references
FAQ
What is affected by CVE-2026-13765?
LearnPress – WordPress LMS Plugin for Create and Sell Online Courses versions listed as affected should be reviewed: up to and including 4.4.1.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
How are Fixnx security risk categories chosen?
Fixnx keeps one canonical risk page and assigns only broad, relevant categories such as ecosystem, technology area, or vulnerability class.