What is CVE-2023-4381?

CVE-2023-4381 is a medium-severity vulnerability in Instantcms, classified under CWE-620. CVSS score: 4.3/10. Published 2023-08-16.

How severe is CVE-2023-4381?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Instantcms

CVE-2023-4381

Unverified Password Change in GitHub repository instantsoft/icms2 prior to 2.16.1-git.

Published 2023-08-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (35.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Instantcms
Instantsoft Instantsoft/icms2 — versions unspecified

Weakness classification (CWE)

CWE-620

References

huntr.dev/bounties/666c2617-e3e9-4955-9c97-2f8ed5262cc3 (Patch, Third Party Advisory)
github.com/instantsoft/icms2/commit/58f8b9941b53b606a1b15a4364005cd2b1965507 (Patch)

Frequently asked questions

What is CVE-2023-4381?: CVE-2023-4381 is a medium-severity vulnerability in Instantcms, classified under CWE-620. CVSS score: 4.3/10. Published 2023-08-16.
How severe is CVE-2023-4381?: Medium severity. CVSS v3 base score is 4.3 out of 10.