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TI-2026-81415 Aliases CVE-2026-112353GHSA-x85g-q7vc-7jh7

Stored cross-site scripting in GFI KerioConnect Webmail

Priority LOW 27CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

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

Summary

GFI KerioConnect before 10.0.8p2 contains a stored cross-site scripting flaw (CWE-79) in its Webmail component. A remote attacker who sends a crafted SVG email attachment that bypasses event-handler sanitization can run JavaScript in a victim's authenticated Webmail session when the victim opens the attachment. The attack can steal credentials and mailbox contents. Proofpoint Threat Research has observed exploitation in the wild as a credential and mailbox stealer.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00243 15th percentileScored 2026-11-07
Fix Fixed GFI KerioConnect (GFI USA, LLC): 10.0.8p2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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

VendorProductAffected versionsFixed inStatusSource
GFI USA, LLCGFI KerioConnectbefore 10.0.8p210.0.8p2Patch availableCNA
  • GFI KerioConnect VendorGFI USA, LLC Affected before 10.0.8p2 Fixed in 10.0.8p2 Patch available CNA

Remediation

Upgrade GFI KerioConnect to version 10.0.8p2.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA GFI KerioConnect (GFI USA, LLC) Fixed in 10.0.8p2

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-112353
  2. 2026-10-27 Alias added: GHSA-x85g-q7vc-7jh7
  3. 2026-10-28 CISA SSVC decision points changed
  4. 2026-10-28 Priority changed: MEDIUM → LOW

References

Patch 1

  • TI-2026-82010 Privilege escalation in GFI KerioConnect KOFF via weak installer permissions CVSS 4.0HIGH 8.5
  • TI-2026-82009 Cross-site scripting in GFI KerioConnect via link auto-formatter CVSS 4.0MEDIUM 5.1

Sources

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