4.3

CVE-2026-9233: expresstech quiz and survey master (qsm) – easy quiz and survey maker Missing Authorization

CVSS: 4.3v3.1MediumDeferred
Published 27-06-2026Last modified 29-06-2026
Open JSON

Vulnerability summary

CVE-2026-9233 is a medium (CVSS 4.3) Missing Authorization vulnerability in expresstech quiz and survey master (qsm) – easy quiz and survey maker. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.5% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 27-06-2026
    PublishedVulnerability first disclosed.
  2. 29-06-2026
    Last modifiedVulnerability information updated.

Description

The Quiz and Survey Master (QSM) – Easy Quiz and Survey Maker plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 11.1.4. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to create, modify, and delete quiz output templates stored in the mlw_quiz_output_templates database table, including storing unsanitized HTML content such as arbitrary script tags.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

0.00 pp

From 0.47% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.47%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Expresstech1 product
Wordpress1 product
  • quiz-master-next≤ 11.1.4 (fixed in 11.1.5)

2 vendors · 2 products

References

13 links
Show all 13 references