CVE-2026-112356

GFI KerioConnect < 10.0.9p2 XSS via Link Auto-Formatter

Published Oct 28, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Gfi
Gfi kerio Connect
Vendors & Products Gfi
Gfi kerio Connect
Type Values Removed Values Added
Metrics ssvc

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

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
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 28, 2026, 6:03 PM
Reserved
Oct 19, 2026, 2:41 PM
Status
Awaiting Analysis
Published
Oct 28, 2026, 4:17 PM
Modified
Oct 29, 2026, 4:19 PM