CVE-2020-18724

MEDIUM 5.4CVE-2020-18724 · Published 03/02/2021 · updated 17/06/2026

In short

CVE-2020-18724 is a MEDIUM (CVSS 5.4) vulnerability affecting mdaemon webmail (altn).
Chance of exploitation in the next 30 days (EPSS): 3.2%, higher than 88.3% of all vulnerabilities.
Fix: update to 20.0.1 or later.

Package	Affected versions	Patched versions
mdaemon webmail altn	`< 20.0.1`	`20.0.1`

Description

Authenticated stored cross-site scripting (XSS) in the contact name field in the distribution list of MDaemon webmail 19.5.5 allows an attacker to executes code and perform a XSS attack while opening a contact list.

References

kailashbohara.com.np/blog/2020/07/15/mdaemon-stored-xss · Exploit
packetstormsecurity.com/files/161332/Alt-N-MDaemon-Webmail-20.0.0-Cross-Site-Scripting.html · Exploit
altn.com/Support/SecurityUpdate/MD082520_MDaemon_EN · Vendor Advisory

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