SB2025051561 - Stored XSS in MDaemon

Description

This security bulletin contains information about 1 vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2025-3929)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 7.1 [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]

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.

Remediation

Install update from vendor's website.

References

• https://mdaemon.com/pages/downloads-critical-updates
• https://files.mdaemon.com/mdaemon/release/RelNotes_en.html