Which versions of Kerio Connect are affected by CVE-2025-2976?

Organizations using A vulnerability should be aware of moderate risk from CVE-2025-2976, a cross-site scripting vulnerability rated CVSS 5.1.

Is there a public PoC exploit available for CVE-2025-2976?

Yes, a public proof-of-concept exploit is available for CVE-2025-2976. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-2976?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Kerio Connect CVE-2025-2976

Q: What is the CVSS score of CVE-2025-2976?

CVE-2025-2976 has a CVSS 4.0 base score of 5.1 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/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 exploitation probability: 0.1%.

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-03-31 cna@vuldb.com

XSS File Upload Kerio Connect Gfi

5.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.1 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:34 vuln.today

PoC Detected

Nov 04, 2025 - 19:36 vuln.today

Public exploit code

CVE Published

Mar 31, 2025 - 05:15 nvd

MEDIUM 5.1

DescriptionCVE.org

A vulnerability was found in GFI KerioConnect 10.0.6. It has been classified as problematic. Affected is an unknown function of the component File Upload. The manipulation leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

A vulnerability was found in GFI KerioConnect 10.0.6. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. A vulnerability was found in GFI KerioConnect 10.0.6. It has been classified as problematic. Affected is an unknown function of the component File Upload. The manipulation leads to cross site scripting. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way. Affected products include: Gfi Kerio Connect.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.