CVE-2024-11182 MDaemon Email Server: web page flaw
In plain words: A web app can be made to act on someone's behalf or reach places it should not. Stolen sessions, actions taken as the victim, or access to internal systems.
Confirmed exploited by CISA on · US federal patch deadline Jun 9, 2025
What to do
- Install MDaemon's security update for Email Server. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- MDaemon Email Server Cross-Site Scripting (XSS) Vulnerability
- Product
- MDaemon Email Server
- CISA description
- MDaemon Email Server contains a cross-site scripting (XSS) vulnerability that allows a remote attacker to load arbitrary JavaScript code via an HTML e-mail message.
- Type of flaw
- Web page flaw (CWE-79)
- Confirmed exploited
- May 19, 2025
- US federal patch deadline
- Jun 9, 2025
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Answering about CVE-2024-11182 ·
Questions about CVE-2024-11182
Is CVE-2024-11182 being exploited?
Yes. CISA added CVE-2024-11182 to its Known Exploited Vulnerabilities catalog on May 19, 2025, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2024-11182?
Install MDaemon's security update for Email Server. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2024-11182?
Only if you use MDaemon Email Server. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.