CVE WatchOct 27, 2026

CVE-2026-112353

GFI KerioConnect (Kerio Connect) before 10.0.8 Patch 2 contains a stored cross-site scripting vulnerability in the Webmail component that al

CVSS

8.2

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Oct 27, 2026 · Last modified: Oct 27, 2026 · CWE-79 · CWE-83

EPSS · 30d

Not enough EPSS history yet.

Technical description

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.

Official references

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