CVE-2026-9233 Missing authorization in Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker
Authenticated contributors can arbitrarily modify quiz templates and inject scripts due to missing authorization checks in the QSM WordPress plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9233?
CVE-2026-9233 is a medium-severity missing authorization vulnerability in expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker, published on 27 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 11.1.4. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to create, modify, and delete quiz output templates stored in the mlw_quiz_output_templates database table, including storing unsanitized HTML content such as arbitrary script tags.
Weakness: CWE-862
Which versions are affected by CVE-2026-9233?
How do I fix CVE-2026-9233?
No fix has been published for CVE-2026-9233 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-9233 being exploited?
There is no known exploitation of CVE-2026-9233 in the wild and no public exploit code.
Sources
Also known as GHSA-jrf7-2c28-2hc3.