CVE-2026-112353 (GCVE-0-2026-112353)
Vulnerability from cvelistv5 – Published: 2026-10-27 16:10 – Updated: 2026-10-28 16:16 X_Known Exploited VulnerabilityTitle
GFI KerioConnect < 10.0.8p2 Stored XSS via SVG Attachment
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 14:34 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://gfi.ai/resource/kerioconnect-product-releases/ | release-notespatch |
| https://www.vulncheck.com/advisories/gfi-keriocon… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| GFI USA, LLC | GFI KerioConnect |
Affected:
0 , < 10.0.8p2
(custom)
|
guessed |
Date Public
2025-11-28 00:00
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 59676dd9-23d6-409c-9453-719f416a04c1
Exploited: Yes
Timestamps
First Seen: 2026-10-27
Asserted: 2026-10-27
Scope
Notes: GFI KerioConnect < 10.0.8p2 Stored XSS via SVG Attachment | Affected: GFI USA / GFI KerioConnect | CVSS: 6.2 (MEDIUM) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | GFI KerioConnect < 10.0.8p2 Stored XSS via SVG Attachment |
| Cve Id | CVE-2026-112353 |
| Vendor | GFI USA |
| Ghsa Id | None |
| Product | GFI KerioConnect |
| Added Date | 2026-10-27T16:30:41.039Z |
| Cvss Score | 6.2 |
| Epss Score | None |
| Previous Ids | |
| Cvss Severity | MEDIUM |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | None |
| Used In Malware | unknown |
| Vulnerability Id | CVE-2026-112353 |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | True |
References
Created: 2026-10-28 17:00 UTC
| Updated: 2026-10-28 17:00 UTC
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