← Vulnerability feed

Vulnerability record · CVE-2021-36580 · published 27 July 2023

CVE-2021-36580: Icewarp server open redirect vulnerability

Icewarp · Icewarp Server

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

6.1 CVSS 3.1 Medium EPSS 1.6% · top 25.4% CWE-601 · Open redirect
6.1CVSS 3.1 base score
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
3References
9 Jul 2026Last modified by NVD

Description

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

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

Track CVE-2021-36580 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-39699Icewarp mail server path traversal vulnerabilityIceWarp Mail Server v10.4.5 was discovered to contain a local file inclusion (LFI) vulnerability via the component /calendar/minimizer/index.php. Thi…EPSS 1.4%8.8CVE-2020-14066Icewarp mail server unrestricted file upload vulnerabilityIceWarp Email Server 12.3.0.1 allows remote attackers to upload JavaScript files that are dangerous for clients to access.EPSS 1.8%7.5CVE-2019-12593Icewarp mail server path traversal vulnerabilityIceWarp Mail Server through 10.4.4 is prone to a local file inclusion vulnerability via webmail/calendar/minimizer/index.php?style=..%5c directory tr…EPSS 41%7.5CVE-2015-1503IceWarp Mail Server directory traversal in webmail scriptsIceWarp Mail Server before 11.2 contains multiple directory traversal flaws in webmail PHP endpoints. The file parameter of webmail/client/skins/defa…EPSS 58%analysed6.5CVE-2020-14064Icewarp mail server exposure of resource to wrong sphere vulnerabilityIceWarp Email Server 12.3.0.1 has Incorrect Access Control for user accounts.EPSS 0.97%6.5CVE-2020-14065Icewarp mail server unrestricted file upload vulnerabilityIceWarp Email Server 12.3.0.1 allows remote attackers to upload files and consume disk space.EPSS 1.5%6.4CVE-2011-3579Icewarp mail server vulnerabilityserver/webmail.php in IceWarp WebMail in IceWarp Mail Server before 10.3.3 allows remote attackers to read arbitrary files, and possibly send HTTP re…EPSS 4.8%6.1CVE-2023-39700Icewarp mail server cross-site scripting vulnerabilityIceWarp Mail Server v10.4.5 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the color parameter.EPSS 1.5%

Source: NIST National Vulnerability Database (record CVE-2021-36580), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.