CVE-2021-36580

Name: CVE-2021-36580
Creator: NVD / NIST
Published: 2023-07-27T18:15:09.893+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.53%

Last modified Jun 17, 2026

CVE-2021-36580 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Open Redirect vulnerability exists in IceWarp MailServer IceWarp Server Deep Castle 2 Update 1 (13.0.1.2) via the referer parameter.. EPSS estimates a 1.53% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

1.53%

71.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

Vendor	Product	Versions
Icewarp	Icewarp Server	< 13.0.1.2
Icewarp	Mail Server	< 13.0.1.2

References

http://icewarp.comProduct
http://mail.ziyan.comPermissions Required
https://medium.com/%40rohitgautam26/cve-2021-36580-69219798231c
http://icewarp.comProduct
http://mail.ziyan.comPermissions Required
https://medium.com/%40rohitgautam26/cve-2021-36580-69219798231c

Timeline

Published: Jul 27, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is 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.

How severe is CVE-2021-36580?

CVE-2021-36580 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.53% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36580?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36580?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST