What is CVE-2019-16647?

CVE-2019-16647 is a high-severity vulnerability in Maxthon Browser, classified under Unquoted Search Path or Element. CVSS score: 7.2/10. Published 2019-10-29.

How severe is CVE-2019-16647?

High severity. CVSS v3 base score is 7.2 out of 10.

Vulnerability in Maxthon Browser

CVE-2019-16647

Unquoted Search Path in Maxthon 5.1.0 to 5.2.7 Browser for Windows.

Published 2019-10-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.020 (79.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-428 — Unquoted Search Path or Element

References

forum.maxthon.com/index.php (Third Party Advisory)
safebreach.com/Post/Maxthon-Browser-for-Windows-Unquoted-Search-Path-and-Potent… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-16647?: CVE-2019-16647 is a high-severity vulnerability in Maxthon Browser, classified under Unquoted Search Path or Element. CVSS score: 7.2/10. Published 2019-10-29.
How severe is CVE-2019-16647?: High severity. CVSS v3 base score is 7.2 out of 10.