Cross-site scripting in MDaemon - CVE-2025-3929
Published: May 15, 2025
Vulnerability identifier: #VU109215
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Amber
CVE-ID: CVE-2025-3929
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Alt-N
Affected software:
MDaemon
MDaemon
Detailed vulnerability description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data when handling IMG tag inside email messages. A remote attacker can trick the victim into opening a specially crafted email message and execute arbitrary JavaScript code in user's browser in context of vulnerable website.
How to mitigate CVE-2025-3929
Install updates from vendor's website.