CVE-2026-2412 Quiz and Survey Master (QSM) <= 10.3.5 - Authenticated (Contributor+) SQL Injection via 'merged_question' Parameter
Authenticated contributors can exploit SQL injection in the QSM plugin to extract sensitive database information.
- 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-2026-2412?
CVE-2026-2412 is a medium-severity SQL injection vulnerability in expresstech Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker, published on 23 Mar 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) plugin for WordPress is vulnerable to SQL Injection via the 'merged_question' parameter in all versions up to, and including, 10.3.5. This is due to insufficient sanitization of user-supplied input before being used in a SQL query. The sanitize_text_field() function applied to the merged_question parameter does not prevent SQL metacharacters like ), OR, AND, and # from being included in the value, which is then directly concatenated into a SQL IN() clause without using $wpdb->prepare() or casting values to integers. This makes it possible for authenticated attackers, with Contributor-level access and above, 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-2026-2412?
How do I fix CVE-2026-2412?
No fix has been published for CVE-2026-2412 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-2026-2412 being exploited?
There is no known exploitation of CVE-2026-2412 in the wild and no public exploit code.
Sources
Also known as GHSA-p9xr-7rv6-w58f.