What is CVE-2023-4650?

CVE-2023-4650 is a medium-severity vulnerability in Instantcms, classified under Improper Access Control. CVSS score: 4.7/10. Published 2023-08-31.

How severe is CVE-2023-4650?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Instantcms

CVE-2023-4650

Improper Access Control in GitHub repository instantsoft/icms2 prior to 2.16.1-git.

Published 2023-08-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.005 (43.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.001

Affected products

Instantcms
Instantsoft Instantsoft/icms2 — versions unspecified

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

huntr.dev/bounties/d92e8985-9d9d-4a62-92e8-ada014ee3b17 (Exploit, Patch, Third Party Advisory)
github.com/instantsoft/icms2/commit/78ff8ca066e86a65ff35470b5622be3aa7d2f928 (Patch)

Frequently asked questions

What is CVE-2023-4650?: CVE-2023-4650 is a medium-severity vulnerability in Instantcms, classified under Improper Access Control. CVSS score: 4.7/10. Published 2023-08-31.
How severe is CVE-2023-4650?: Medium severity. CVSS v3 base score is 4.7 out of 10.