8.8

CVE-2021-36906: expresstech quiz and survey master

CVSS: 8.8v3.1HighModified
Published 03-11-2022Last modified 28-04-2026
Open JSON

Vulnerability summary

CVE-2021-36906 is a high (CVSS 8.8) vulnerability in expresstech quiz and survey master. EPSS estimates a 0.59% chance of exploitation in the next 30 days, higher than 47.3% of scored vulnerabilities. Fixed in 7.3.7.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.59%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 03-11-2022
    PublishedVulnerability first disclosed.
  2. 28-04-2026
    Last modifiedVulnerability information updated.

Description

Multiple Insecure Direct Object References (IDOR) vulnerabilities in ExpressTech Quiz And Survey Master plugin <= 7.3.6 on WordPress.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.59%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

+0.01 pp

From 0.58% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.59%

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

Expresstech2 products
Wordpress1 product
  • quiz-master-next≤ 7.3.6 (fixed in 7.3.7)

2 vendors · 3 products

References

3 links