What is CVE-2021-3647?

CVE-2021-3647 is a medium-severity vulnerability in Medialize Medialize/uri.js, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2021-07-16.

How severe is CVE-2021-3647?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Open Redirect in Medialize Medialize/uri.js

CVE-2021-3647

URI.js is vulnerable to URL Redirection to Untrusted Site

Vulnerability class: Open Redirect

Published 2021-07-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.5% 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

Medialize Medialize/uri.js — versions unspecified
Uri.js Project

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

huntr.dev/bounties/1625558772840-medialize/URI.js (Exploit, Third Party Advisory, Issue Tracking)
github.com/medialize/URI.js/commit/ac43ca8f80c042f0256fb551ea5203863dec4481 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-3647?: CVE-2021-3647 is a medium-severity vulnerability in Medialize Medialize/uri.js, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2021-07-16.
How severe is CVE-2021-3647?: Medium severity. CVSS v3 base score is 6.1 out of 10.