CVE-2020-18724

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-02-03 · updated 2026-06-17
Weakness: CWE-79

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.

Affected products

Altn Mdaemon Webmail: before 20.0.1 — fixed in 20.0.1

How to fix

Upgrade to a fixed version: Altn Mdaemon Webmail 20.0.1. Check the vendor advisory for mitigations.

References

http://kailashbohara.com.np/blog/2020/07/15/mdaemon-stored-xss
http://packetstormsecurity.com/files/161332/Alt-N-MDaemon-Webmail-20.0.0-Cross-Site-Scripting.html
https://www.altn.com/Support/SecurityUpdate/MD082520_MDaemon_EN/
http://kailashbohara.com.np/blog/2020/07/15/mdaemon-stored-xss
http://packetstormsecurity.com/files/161332/Alt-N-MDaemon-Webmail-20.0.0-Cross-Site-Scripting.html
https://www.altn.com/Support/SecurityUpdate/MD082520_MDaemon_EN/

Get alerted when CVE-2020-18724 or the next vulnerability affects your stack