What’s Vulnerable › Vulnerabilities

CVE-2025-9318: Quiz and Survey Master (QSM) <= 10.3.1 - Authenticated (Subscriber+) SQL Injection via `is_linking` Query Parameter

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-06 · updated 2026-10-07
• Weakness: CWE-89

Description

The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to time-based SQL Injection via the ‘is_linking’ parameter in all versions up to, and including, 10.3.1 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with Subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Affected products

• ExpressTech Quiz And Survey Master: before 10.3.2 — fixed in 10.3.2

How to fix

Upgrade to a fixed version: ExpressTech Quiz And Survey Master 10.3.2. Check the vendor advisory for mitigations.

References

• https://plugins.trac.wordpress.org/browser/quiz-master-next/tags/10.2.6/php/rest-api.php#L533
• https://www.wordfence.com/threat-intel/vulnerabilities/id/e6524e66-5bd1-4616-8185-c0501a09893e?source=cve

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