What is the CVSS score of CVE-2025-34490?

CVE-2025-34490 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.1%.

Which versions of Mailessentials are affected by CVE-2025-34490?

Organizations using GFI MailEssentials prior to version 21.8 should be aware of notable risk from CVE-2025-34490, a XML external entity vulnerability rated CVSS 6.5.

Is there a public PoC exploit available for CVE-2025-34490?

Yes, a public proof-of-concept exploit is available for CVE-2025-34490. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-34490?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Mailessentials CVE-2025-34490

MEDIUM

Improper Restriction of XML External Entity Reference (CWE-611)

2025-04-28 disclosure@vulncheck.com

XXE Mailessentials

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:39 vuln.today

PoC Detected

Nov 04, 2025 - 23:15 vuln.today

Public exploit code

CVE Published

Apr 28, 2025 - 19:15 nvd

MEDIUM 6.5

DescriptionCVE.org

GFI MailEssentials prior to version 21.8 is vulnerable to an XML External Entity (XXE) issue. An authenticated and remote attacker can send crafted HTTP requests to read arbitrary system files.

AnalysisAI

GFI MailEssentials prior to version 21.8 is vulnerable to an XML External Entity (XXE) issue. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as XML External Entity (XXE) (CWE-611), which allows attackers to read arbitrary files or perform SSRF through XML processing. GFI MailEssentials prior to version 21.8 is vulnerable to an XML External Entity (XXE) issue. An authenticated and remote attacker can send crafted HTTP requests to read arbitrary system files. Affected products include: Gfi Mailessentials. Version information: version 21.8.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Disable external entity processing in XML parsers, use JSON instead of XML where possible.