CVE-2021-36898: expresstech quiz and survey master SQL Injection
CVSS: 7.5v3.1HighModified
Published 28-10-2022Last modified 28-04-2026
Vulnerability summary
CVE-2021-36898 is a high (CVSS 7.5) SQL Injection vulnerability in expresstech quiz and survey master. EPSS estimates a 0.91% chance of exploitation in the next 30 days, higher than 59.1% of scored vulnerabilities. Fixed in 7.3.5.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.91%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 28-10-2022PublishedVulnerability first disclosed.
- 28-04-2026Last modifiedVulnerability information updated.
Description
Auth. SQL Injection (SQLi) vulnerability in Quiz And Survey Master plugin <= 7.3.4 on WordPress.
CVSS metrics
3 scores · 3 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NSources3 sources · 7.2–7.5
- NVDNIST7.2HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HDiffers
- wordfenceSource7.2HighCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HDiffers
EPSS trend
Probability
0.91%
Chance of exploitation in the next 30 days
Percentile
59%
Versus all other CVEs
30-day change
+0.02 pp
From 0.89% on 18-09-2026
18-09-202618-10-2026
EPSS score0.91%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Expresstech2 products
- quiz and survey master≤ 7.3.4
- quiz and survey master (wordpress plugin)≥ <= 7.3.4, ≤ 7.3.4
Wordpress1 product
- quiz-master-next≤ 7.3.4 (fixed in 7.3.5)
2 vendors · 3 products
References
3 links- patchstack.com/database/…Third Party Advisory