TI-2025-02590 Aliases CVE-2025-2975 GHSA-gc8p-c387-qwq8

GFI KerioConnect Signature EditHtmlSource cross site scripting

MEDIUM 56CWE-79Published 2025-03-31 · Updated 2025-03-31

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting, Code execution
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79 and CWE-94.

Summary

A vulnerability was found in GFI KerioConnect 10.0.6 and classified as problematic. This issue affects some unknown processing of the file Settings/Email/Signature/EditHtmlSource of the component Signature Handler. The manipulation leads to cross site scripting. The attack may be initiated 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00305 23rd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
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
GFI Software	KerioConnect	10.0.6	—	No fix listed	CNA

KerioConnect VendorGFI Software Affected 10.0.6 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:gfi:kerio_connect:10.0.6:-::::::	10.0.6	Vulnerable	GFI Software

cpe:2.3:a:gfi:kerio_connect:10.0.6:-:*:*:*:*:*:* Versions 10.0.6 Vulnerable ·GFI Software

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-2975
2026-10-03 Alias added: GHSA-gc8p-c387-qwq8

References

Exploit 1

https://github.com/0xs1ash/poc/blob/main/xss.md#1-stored-xss

TI-2023-10691 An issue was discovered in GFI Kerio Connect 9.4.1 patch 1 (fixed in 10.0.0). CVSS 3.1HIGH 8.8
TI-2025-02592 GFI KerioConnect PDF File cross site scripting CVSS 4.0MEDIUM 5.1
TI-2025-02591 GFI KerioConnect File Upload cross site scripting CVSS 4.0MEDIUM 5.1
TI-2017-05092 Kerio Connect 8.0.0 through 9.2.2, and Kerio Connect Client desktop application for… CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences