WordPress security changelog
MEDIUM CVE-2026-5797 Deferred

Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker: A security weakness

Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 10.1.0.

CVE / CNA score 5.3 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker
Plugin slug
quiz-master-next
Affected
<= 10.1.0
Safe version
See mitigation notes
Published
Apr 17, 2026
Weakness
CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

This CVE was published Apr 17, 2026 and is one of 48 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is identified. Update Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker when a release after 10.1.0 becomes available; until then, disable and remove it when the site's risk warrants. The official upstream changelog lists version 11.2.4, which is newer than the published affected range. Its changelog does not clearly confirm this specific fix, so it is not counted as a known-safe release.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Quiz And Survey Master plugin for WordPress is vulnerable to Arbitrary Shortcode Execution in versions up to and including 11.1.0. This is due to insufficient input sanitization and the execution of do_shortcode() on user-submitted quiz answer text. User-submitted answers pass through sanitize_text_field() and htmlspecialchars(), which only strip HTML tags but do not encode or remove shortcode brackets [ and ]. When quiz results are displayed, the plugin calls do_shortcode() on the entire results page output (including user answers), causing any injected shortcodes to be executed. This makes it possible for unauthenticated attackers to inject arbitrary WordPress shortcodes such as [qsm_result id=X] to access other users' quiz submissions without authorization, as the qsm_result shortcode lacks any authorization checks.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

Primary and upstream sources