Is CVE-2021-27180 actively exploited?

No active exploitation of CVE-2021-27180 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-27180 be exploited remotely?

Yes. CVE-2021-27180 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-27180?

CVE-2021-27180 has a CVSS score of 6.1 (MEDIUM).

HOME VULNERABILITIESCVE-2021-27180

MEDIUM

CVE-2021-27180

CWE-79Published: April 14, 2021· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-27180 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.