SQL Injection in Quiz and Survey Master Affects 40k Sites
🔒 A SQL injection vulnerability in the Quiz and Survey Master (QSM) WordPress plugin affected more than 40,000 sites running versions 10.3.1 and earlier. The flaw allowed any logged-in user with Subscriber-level privileges or higher to supply crafted input to a REST API parameter named is_linking, which was concatenated into a database query without sanitisation. Patchstack credited Doan Dinh Van for the report and QSM released version 10.3.2 to enforce integer casting (intval) and mitigate the issue; the defect is tracked as CVE-2025-67987. There is no public evidence of active exploitation, but the bug underscores risks from trusting request data and the need for prepared statements.
