Stored Cross-Site Scripting in GFI MailEssentials AI Configuration
CVE-2026-23610

5.1MEDIUM

Key Information:

Vendor

Gfi Software

Status
Mailessentials Ai
Vendor
CVE Published:
19 February 2026

What is CVE-2026-23610?

GFI MailEssentials AI versions prior to 22.4 are susceptible to a stored cross-site scripting vulnerability through the POP2Exchange configuration endpoint. The flaw exists when an authenticated user can inject malicious HTML/JavaScript into the POP3 server login field of the JSON "popServers" payload while accessing the /MailEssentials/pages/MailSecurity/POP2Exchange.aspx/Save endpoint. This injected script is stored and can be executed later in the management interface context, posing significant risks to users with administrative access.

Affected Version(s)

MailEssentials AI 0 < 22.4

References

https://gfi.ai/products-and-solutions/network-security-so...
release-notespatch
https://www.vulncheck.com/advisories/gfi-mailessentials-a...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Alex Williams from Pellera Technologies
VulnCheck
.