What is CVE-2023-4188?

CVE-2023-4188 is a critical-severity vulnerability in Instantcms, classified under SQL Injection. CVSS score: 9.1/10. Published 2023-08-05.

How severe is CVE-2023-4188?

Critical severity. CVSS v3 base score is 9.1 out of 10.

SQL Injection in Instantcms

CVE-2023-4188

SQL Injection in GitHub repository instantsoft/icms2 prior to 2.16.1-git.

Vulnerability class: SQL Injection

Published 2023-08-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (59.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Instantcms
Instantsoft Instantsoft/icms2 — versions unspecified

Weakness classification (CWE)

CWE-89 — SQL Injection

References

huntr.dev/bounties/fe9809b6-40ad-4e81-9197-a9aa42e8a7bf (Exploit, Patch, Third Party Advisory)
github.com/instantsoft/icms2/commit/1dbc3e6c8fbf5d2dc551cb27fad0de3584dee40f (Patch)

Frequently asked questions

What is CVE-2023-4188?: CVE-2023-4188 is a critical-severity vulnerability in Instantcms, classified under SQL Injection. CVSS score: 9.1/10. Published 2023-08-05.
How severe is CVE-2023-4188?: Critical severity. CVSS v3 base score is 9.1 out of 10.