XSS in Gfi Usa, Llc Kerioconnect
CVE-2026-112356
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- gfi.ai/resource/kerioconnect-product-releases/ (release-notes, patch)
- VulnCheck Advisory: GFI KerioConnect < 10.0.9p2 HTML Injection via Link Auto-Formatter (third-party-advisory)
- www.vulncheck.com/advisories/gfi-kerioconnect-9p2-xss-via-link-auto-formatter (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112356?
- CVE-2026-112356 is a medium-severity vulnerability in Gfi Usa, Llc Kerioconnect, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-28.
- How severe is CVE-2026-112356?
- Medium severity. CVSS v3 base score is 6.1 out of 10.