Stored XSS vulnerability in MDaemon Email Server
Priority LOW 25CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00647 51st percentileScored 2026-11-07
Fix Fixed Email Server (MDaemon): 25.0.2
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| MDaemon | Email Server | up to 25.0.1 | 25.0.2 | Patch available | CNA |
- Email Server VendorMDaemon Affected up to 25.0.1 Fixed in 25.0.2 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mdaemon:email_server:*:*:*:*:*:*:*:* | 20.0.0 to before 20.0.9; 21.0.0 to before 21.0.8; 21.5.0 to before 21.5.6; 22.0.0 to before 22.0.7; 23.0.0 to before 23.0.4; 23.5.0 to before 23.5.5; 24.0.0 to before 24.0.4; 24.5.0 to before 24.5.3; 25.0.0 to before 25.0.2 | Vulnerable | MDaemon |
- cpe:2.3:a:mdaemon:email_server:*:*:*:*:*:*:*:* Versions 20.0.0 to before 20.0.9; 21.0.0 to before 21.0.8; 21.5.0 to before 21.5.6; 22.0.0 to before 22.0.7; 23.0.0 to before 23.0.4; 23.5.0 to before 23.5.5; 24.0.0 to before 24.0.4; 24.5.0 to before 24.5.3; 25.0.0 to before 25.0.2 Vulnerable ·MDaemon
Remediation
- Fix · CNA Email Server (MDaemon) Fixed in 25.0.2
Timeline
- 2026-10-02 Threatist record created from CVE-2025-3929
- 2026-10-03 Alias added: GHSA-jgvv-fw39-8435
- 2026-10-25 EPSS moved to the 50th–90th percentile
References
Sources
- CVE-2025-3929 · CVE Program
- CVE-2025-3929 · NVD
- FIRST EPSS
- GHSA-jgvv-fw39-8435 · GitHub Advisory Database · CC BY 4.0
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