What is CVE-2026-103917?

CVE-2026-103917 is a medium-severity vulnerability in Expresstech Quiz And Survey Master (Qsm) – Maker &, classified under Code Injection. CVSS score: 6.5/10. Published 2026-11-07.

How severe is CVE-2026-103917?

Medium severity. CVSS v3 base score is 6.5 out of 10.

RCE in Expresstech Quiz And Survey Master (Qsm) – Maker &

CVE-2026-103917

The The Quiz and Survey Master (QSM) – Quiz Maker & Survey Maker plugin for WordPress is vulnerable to arbitrary shortcode execution in all versions up to, and including, 11.2.7. This is due to the software allowing users to execute an action that does not properly validate a value before running do_shortcode. This makes it possible for unauthenticated attackers to execute arbitrary shortcodes. The submission nonce is dispensed to any unauthenticated caller by the public wp_ajax_nopriv_qsm_create_quiz_nonce endpoint, meaning it functions as a CSRF token rather than an authorization barrier and imposes no meaningful obstacle to exploitation.

Vulnerability class: RCE (Remote Code Execution)

Published 2026-11-07 · last modified 2026-11-08.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Expresstech Quiz And Survey Master (Qsm) – Maker &

Weakness classification (CWE)

CWE-94 — Code Injection

References

Frequently asked questions

What is CVE-2026-103917?: CVE-2026-103917 is a medium-severity vulnerability in Expresstech Quiz And Survey Master (Qsm) – Maker &, classified under Code Injection. CVSS score: 6.5/10. Published 2026-11-07.
How severe is CVE-2026-103917?: Medium severity. CVSS v3 base score is 6.5 out of 10.