CVE-2026-4365

LearnPress <= 4.3.2.8 - Missing Authorization to Unauthenticated Arbitrary Quiz Answer Deletion

2026-04-13 12:59
Supakiad S. (m3ez)

Strategic Overview

Status
Patched in 4.3.3
Affected Plugin
LearnPress – WordPress LMS Plugin for Create and Sell Online Courses
Affected Version
<= 4.3.2.8
CVSS
9.1Critical
Weakness type
CWE-862 · Missing Authorization
CVE
CVE-2026-4365
View all LearnPress – WordPress LMS Plugin for Create and Sell Online Courses vulnerabilities

At a glance

CVE-2026-4365 is a critical-severity Missing Authorization vulnerability in the LearnPress WordPress plugin, affecting versions <= 4.3.2.8. It carries a CVSS score of 9.1 (reachable over the network; low attack complexity; high integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 4.3.3; sites on affected versions should update now. Disclosed April 2026, reported by Supakiad S. (m3ez).

Vulnerability Overview

The LearnPress plugin for WordPress is vulnerable to unauthorized data deletion due to a missing capability check on the `delete_question_answer()` function in all versions up to, and including, 4.3.2.8. The plugin exposes a `wp_rest` nonce in public frontend HTML (`lpData`) to unauthenticated visitors, and uses that nonce as the only security gate for the `lp-load-ajax` AJAX dispatcher. The `delete_question_answer` action has no capability or ownership check. This makes it possible for unauthenticated attackers to delete any quiz answer option by sending a crafted POST request with a publicly available nonce.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on integrity, availability.

CWE-862: Missing Authorization

LearnPress <= 4.3.2.8 carries this weakness at delete_question_answer(), and reaching it takes no account at all. A missing authorization check means a function is reachable by anyone who can reach the endpoint, because the code never asks whether the caller is allowed to perform the action.

Any user who can reach the endpoint gets to run an action reserved for higher-privileged roles, from reading protected data to changing settings or content. For LearnPress the fix is 4.3.3: builds <= 4.3.2.8 are affected, anything from 4.3.3 onward is not.

Remediation

Update to version 4.3.3, or a newer patched version

How does WordSec protect against this?

This one needs no account at all, which puts it outside what login hardening can reach; WordSec's login security narrows the account-level paths around it, and the firewall is what inspects the request itself. None of that substitutes for the fix: LearnPress 4.3.3 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-4365https://www.wordfence.com/threat-intel/vulnerabilities/id/021bd566-1663-46ba-a616-ab554b691cbbhttps://nvd.nist.gov/vuln/detail/CVE-2026-4365

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C