What’s Vulnerable › Vulnerabilities

CVE-2021-36580

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-07-27 · updated 2026-07-09
• Weakness: CWE-601

Description

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

Affected products

• Icewarp Server: before 13.0.1.2 — fixed in 13.0.1.2
• Icewarp Mail Server: before 13.0.1.2 — fixed in 13.0.1.2

How to fix

Upgrade to a fixed version: Icewarp Server 13.0.1.2; Icewarp Mail Server 13.0.1.2. Check the vendor advisory for mitigations.

References

• https://medium.com/@rohitgautam26/cve-2021-36580-69219798231c
• http://mail.ziyan.com
• https://medium.com/%40rohitgautam26/cve-2021-36580-69219798231c

Get alerted when CVE-2021-36580 or the next vulnerability affects your stack