CVE-2025-3929

MEDIUM EXPLOITED

MDaemon Email Server < 20.0.9 - Stored Cross-Site Scripting via HTML Email img Tag

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2025-3929 has been observed exploited in the wild (reported by VulnCheck KEV).

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.

References (1)

Core 1

Scores

CVSS v3 6.1
EPSS 0.0047
EPSS Percentile 37.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

VulnCheck KEV 2025-04-29
CWE
CWE-79
Status published
Products (1)
mdaemon/email_server 20.0.0 - 20.0.9
Published Apr 29, 2025
Tracked Since Feb 18, 2026