What is CVE-2021-3021?

CVE-2021-3021 is a critical-severity vulnerability in Ispconfig, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-01-05.

How severe is CVE-2021-3021?

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

SQL Injection in Ispconfig

CVE-2021-3021

ISPConfig before 3.2.2 allows SQL injection.

Vulnerability class: SQL Injection

Published 2021-01-05 · 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: 0.021 (81.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000

Affected products

Ispconfig

Weakness classification (CWE)

CWE-89 — SQL Injection

References

www.ispconfig.org/blog/ispconfig-3-2-2-released-important-security-update/ (Release Notes, Vendor Advisory)
twitter.com/ispconfig/status/1346142615511724032 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-3021?: CVE-2021-3021 is a critical-severity vulnerability in Ispconfig, classified under SQL Injection. CVSS score: 9.8/10. Published 2021-01-05.
How severe is CVE-2021-3021?: Critical severity. CVSS v3 base score is 9.8 out of 10.