GFI KerioConnect up to 10.0.8p1 Webmail cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in GFI KerioConnect up to 10.0.8p1. Impacted is an unknown function of the component Webmail. Performing a manipulation results in cross site scripting. This vulnerability was named CVE-2026-112353. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in GFI KerioConnect up to 10.0.8p1. It has been classified as problematic. This affects some unknown functionality of the component Webmail. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

GFI KerioConnect (Kerio Connect) before 10.0.8 Patch 2 contains a stored cross-site scripting vulnerability in the Webmail component that allows a remote attacker to run JavaScript in a victim's authenticated Webmail session by uploading a crafted SVG email attachment that bypasses sanitization of event-handler attributes. Attackers can exploit the temporary-download endpoint's insufficient Content-Security-Policy sandbox to execute scripts when the attachment is opened, enabling theft of the victim's credentials and mailbox contents. Proofpoint Threat Research has observed exploitation in the wild as a credential and mailbox stealer.

It is possible to read the advisory at gfi.ai. This vulnerability is uniquely identified as CVE-2026-112353 since 10/19/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 10.0.8p2 eliminates this vulnerability.

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Productinfo

Vendor

• GFI

Name

• KerioConnect

Version

• 10.0.8p1

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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