What’s Vulnerable › Vulnerabilities

CVE-2021-27180

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-14 · updated 2026-06-17
• Weakness: CWE-79

Description

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.

Affected products

• Altn Mdaemon: before 20.0.4 — fixed in 20.0.4

How to fix

Upgrade to a fixed version: Altn Mdaemon 20.0.4. Check the vendor advisory for mitigations.

References

• https://github.com/chudyPB/MDaemon-Advisories
• https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/
• https://github.com/chudyPB/MDaemon-Advisories
• https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/

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