TI-2021-08727 Aliases CVE-2021-27180 GHSA-7wfx-rcx6-fp9g

An issue was discovered in MDaemon before 20.0.4.

LOW 29CWE-79Published 2021-04-14 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

An issue was discovered in MDaemon before 20.0.4. There is Reflected XSS in Webmail (aka WorldClient). It can be exploited via a GET request. It allows performing any action with the privileges of the attacked user.

Why it matters now

EPSS 0.00926 60th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:altn:mdaemon::::::::	before 20.0.4	Vulnerable	Altn

cpe:2.3:a:altn:mdaemon:*:*:*:*:*:*:*:* Versions before 20.0.4 Vulnerable ·Altn

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-27180
2026-10-03 Alias added: GHSA-7wfx-rcx6-fp9g

References

Exploit 1

https://github.com/chudyPB/MDaemon-Advisories

Patch 1

https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/

TI-2008-01307 Stack-based buffer overflow in the IMAP server in Alt-N Technologies MDaemon 9.6.4 allows… CVSS 2.0MEDIUM 6.5
TI-2008-02521 The WordClient interface in Alt-N Technologies MDaemon 9.6.5 allows remote attackers to… CVSS 2.0MEDIUM 5.0
TI-2021-08729 An issue was discovered in MDaemon before 20.0.4. CVSS 3.1HIGH 8.8
TI-2021-08728 An issue was discovered in MDaemon before 20.0.4. CVSS 3.1HIGH 8.8
TI-2021-08730 An issue was discovered in MDaemon before 20.0.4. CVSS 3.1HIGH 7.2
TI-2019-06475 MDaemon Webmail 14.x through 18.x before 18.5.2 has XSS (issue 2 of 2). CVSS 3.0MEDIUM 6.1

See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences