What is CVE-2021-36580?

CVE-2021-36580 is a medium-severity vulnerability in Icewarp Icewarp_server, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2023-07-27.

How severe is CVE-2021-36580?

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

Is CVE-2021-36580 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Open Redirect in Icewarp Icewarp_server

CVE-2021-36580

Open Redirect vulnerability exists in IceWarp MailServer IceWarp Server Deep Castle 2 Update 1 (13.0.1.2) via the referer parameter.

Vulnerability class: Open Redirect

EPSS: 0.015 (71.6th percentile) — read the EPSS interpretation.

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.

Affected products

Weakness classification (CWE)

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

Public proof-of-concept exploits

References

cve@mitre.org (Product)
cve@mitre.org (Permissions Required)
cve@mitre.org

Frequently asked questions

What is CVE-2021-36580?: CVE-2021-36580 is a medium-severity vulnerability in Icewarp Icewarp_server, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.1/10. Published 2023-07-27.
How severe is CVE-2021-36580?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-36580 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.