What is CVE-2021-30175?

CVE-2021-30175 is a critical-severity vulnerability in Zerof Web Server, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-04-13.

How severe is CVE-2021-30175?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-30175 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SQL Injection in Zerof Web Server

CVE-2021-30175

ZEROF Web Server 1.0 (April 2021) allows SQL Injection via the /HandleEvent endpoint for the login page.

Vulnerability class: SQL Injection

Published 2021-04-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.085 (94.9th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.085 · newest: 0.085 · change: 0.000

Affected products

Zerof Web Server — versions 1.0

Weakness classification (CWE)

CWE-89 — SQL Injection

Public proof-of-concept exploits

awillix/research

References

pro.zerof.ru (Product)
github.com/awillix/research/blob/main/cve/CVE-2021-30175.md (Third Party Advisory)

Frequently asked questions

What is CVE-2021-30175?: CVE-2021-30175 is a critical-severity vulnerability in Zerof Web Server, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-04-13.
How severe is CVE-2021-30175?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-30175 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.