What is CVE-2023-38187?

CVE-2023-38187 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under Improper Privilege Management. CVSS score: 6.5/10. Published 2023-07-21.

How severe is CVE-2023-38187?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Privilege escalation in Microsoft Edge Chromium

CVE-2023-38187

Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability

Vulnerability class: Privilege Escalation

Published 2023-07-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.3th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Microsoft Edge Chromium
Microsoft Edge (Chromium-Based) — versions 1.0.0

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38187 (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-38187?: CVE-2023-38187 is a medium-severity vulnerability in Microsoft Edge Chromium, classified under Improper Privilege Management. CVSS score: 6.5/10. Published 2023-07-21.
How severe is CVE-2023-38187?: Medium severity. CVSS v3 base score is 6.5 out of 10.