CVE-2026-13767 Quiz and Survey Master (QSM) <= 11.2.0 - Authenticated (Custom+) SQL Injection via 'pages' Parameter
Authenticated attackers can inject SQL via quiz page data to extract sensitive database information when administrators view the quiz questions tab.
- 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-2026-13767?
CVE-2026-13767 is a medium-severity SQL injection vulnerability in expresstech Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker, published on 16 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Quiz Master Next plugin for WordPress is vulnerable to SQL Injection via stored quiz page data in versions up to, and including, 11.2.0. This is due to insufficient escaping on the user-supplied 'pages' parameter persisted by the qsm_ajax_save_pages() AJAX handler (sanitize_text_field only) and lack of sufficient preparation on the existing SQL query built in qsm_options_questions_tab_content() at line 143, where the stored page IDs are interpolated into an IN() clause via implode() with no $wpdb->prepare() and no integer casting. This makes it possible for authenticated attackers, with Author-level access and above (who can own a quiz they are entitled to edit), to plant a SQL payload that is executed second-order whenever any user (including an administrator) views the quiz's Questions tab, allowing them to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Weakness: CWE-89
Which versions are affected by CVE-2026-13767?
How do I fix CVE-2026-13767?
No fix has been published for CVE-2026-13767 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-13767 being exploited?
There is no known exploitation of CVE-2026-13767 in the wild and no public exploit code.
Sources
Also known as GHSA-4895-w473-xhfc.