CVE-2026-25324

Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker <= 10.3.4 - Unauthenticated Insecure Direct Object Reference

2026-02-01 00:00
johska

Strategic Overview

Status
Patched in 10.3.5
Affected Plugin
Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker
Affected Version
<= 10.3.4
CVSS
5.3Medium
Weakness type
CWE-639 · Authorization Bypass Through User-Controlled Key
CVE
CVE-2026-25324
View all Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker vulnerabilities

At a glance

CVE-2026-25324 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the Quiz and Survey Master (QSM) WordPress plugin, affecting versions <= 10.3.4. It carries a CVSS score of 5.3 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 10.3.5; sites on affected versions should update now. Disclosed February 2026, reported by johska.

Vulnerability Overview

The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 10.3.4 due to missing validation on a user controlled key. This makes it possible for unauthenticated attackers to [describe the impact of the vulnerability].

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.

CWE-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in Quiz and Survey Master (QSM) <= 10.3.4 takes no account at all. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Quiz and Survey Master (QSM) the fix is 10.3.5: builds <= 10.3.4 are affected, anything from 10.3.5 onward is not.

Remediation

Update to version 10.3.5, 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: Quiz and Survey Master (QSM) 10.3.5 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-25324https://www.wordfence.com/threat-intel/vulnerabilities/id/a67ab966-c179-4ea6-bf8c-bc22f9b4644bhttps://nvd.nist.gov/vuln/detail/CVE-2026-25324

Related records

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