GFI KerioConnect (Kerio Connect) before 10.0.9 Patch 2 contains a cross-site scripting vulnerability in the Webmail component that allows a remote attacker to spoof link targets or inject HTML into a message as rendered in a victim's authenticated Webmail session by sending a crafted email whose text is already inside a link. Attackers can exploit the link auto-formatter's re-processing of already-linked text, using quote characters to break out of the href attribute and inject attacker-controlled markup to execute script in the victim's session.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
GFI USA, LLC GFI KerioConnect unaffected
Version Status Constraints
0 affected < 10.0.9p2

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gfi.ai/resource/kerioconnect-product-releases/ cve-icon cve-icon
https://www.vulncheck.com/advisories/gfi-kerioconnect-9p2-xss-via-link-auto-formatter cve-icon cve-icon
History

Wed, 28 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 28 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
Description GFI KerioConnect (Kerio Connect) before 10.0.9 Patch 2 contains an HTML injection vulnerability that allows remote attackers to inject malicious markup by crafting emails whose link text contains quote characters, causing the Webmail auto-formatter to break out of the href attribute while re-processing text already inside a link. Attackers can exploit this flaw to spoof link targets or inject arbitrary HTML into the rendered message within a victim's Webmail session. GFI KerioConnect (Kerio Connect) before 10.0.9 Patch 2 contains a cross-site scripting vulnerability in the Webmail component that allows a remote attacker to spoof link targets or inject HTML into a message as rendered in a victim's authenticated Webmail session by sending a crafted email whose text is already inside a link. Attackers can exploit the link auto-formatter's re-processing of already-linked text, using quote characters to break out of the href attribute and inject attacker-controlled markup to execute script in the victim's session.
Title GFI KerioConnect < 10.0.9p2 HTML Injection via Link Auto-Formatter GFI KerioConnect < 10.0.9p2 XSS via Link Auto-Formatter
References

Wed, 28 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Description GFI KerioConnect (Kerio Connect) before 10.0.9 Patch 2 contains an HTML injection vulnerability that allows remote attackers to inject malicious markup by crafting emails whose link text contains quote characters, causing the Webmail auto-formatter to break out of the href attribute while re-processing text already inside a link. Attackers can exploit this flaw to spoof link targets or inject arbitrary HTML into the rendered message within a victim's Webmail session.
Title GFI KerioConnect < 10.0.9p2 HTML Injection via Link Auto-Formatter
Weaknesses CWE-79
CWE-83
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-28T18:03:52.733Z

Reserved: 2026-10-19T14:41:46.703Z

Link: CVE-2026-112356

cve-icon Vulnrichment

Updated: 2026-10-28T16:00:57.792Z

cve-icon NVD

Status : Received

Published: 2026-10-28T16:17:01.663

Modified: 2026-10-28T16:17:01.663

Link: CVE-2026-112356

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-28T17:00:17Z

Weaknesses