CVE-2025-3929

Name: CVE-2025-3929
Creator: NVD / NIST
Published: 2025-04-29T12:15:32.3+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.47%

Last modified Jun 17, 2026

CVE-2025-3929 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An XSS issue was discovered in MDaemon Email Server version 25.0.1 and below. An attacker can send a specially crafted HTML e-mail message with JavaScript in an img tag. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

Description

An XSS issue was discovered in MDaemon Email Server version 25.0.1 and below. An attacker can send a specially crafted HTML e-mail message with JavaScript in an img tag. This could allow a remote attacker to load arbitrary JavaScript code in the context of a webmail user's browser window, and access user data.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

5.3/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.47%

37.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mdaemon	Email Server	>= 20.0.0, < 20.0.9
Mdaemon	Email Server	>= 21.0.0, < 21.0.8
Mdaemon	Email Server	>= 21.5.0, < 21.5.6
Mdaemon	Email Server	>= 22.0.0, < 22.0.7
Mdaemon	Email Server	>= 23.0.0, < 23.0.4
Mdaemon	Email Server	>= 23.5.0, < 23.5.5
Mdaemon	Email Server	>= 24.0.0, < 24.0.4
Mdaemon	Email Server	>= 24.5.0, < 24.5.3
Mdaemon	Email Server	>= 25.0.0, < 25.0.2

References

https://mdaemon.com/pages/downloads-critical-updatesRelease Notes

Timeline

Published: Apr 29, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-3929?

How severe is CVE-2025-3929?

CVE-2025-3929 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2025-3929?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-3929?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST