What is CVE-2019-4209?

CVE-2019-4209 is a medium-severity vulnerability in Hcl Connections, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2020-05-01.

How severe is CVE-2019-4209?

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

Open Redirect in Hcl Connections

CVE-2019-4209

HCL Connections v5.5, v6.0, and v6.5 contains an open redirect vulnerability which could be exploited by an attacker to conduct phishing attacks.

Vulnerability class: Open Redirect

Published 2020-05-01 · 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: 0.006 (48.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Hcl Connections — versions v5.5, v6.0, v6.5
Hcltech Connections — versions 5.5, 6.0, 6.5

Weakness classification (CWE)

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

References

support.hcltechsw.com/csm (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2019-4209?: CVE-2019-4209 is a medium-severity vulnerability in Hcl Connections, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2020-05-01.
How severe is CVE-2019-4209?: Medium severity. CVSS v3 base score is 6.1 out of 10.