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GFI MailEssentials AI Attachment Filtering Rule Stored Cross-Site Scripting Vulnerability

Vulnerability

A stored cross-site scripting vulnerability has been identified in GFI MailEssentials AI versions prior to 22.4. The issue arises in the Attachment Filtering rule creation workflow, where an authenticated user can inject HTML or JavaScript into a specific parameter. This injected script is then stored and later executed in the management interface, impacting the logged-in user.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user.

Remediation

Users can upgrade to GFI MailEssentials AI version 22.4 or later to address this vulnerability.

Added: Feb 19, 2026, 7:28 PM
Updated: Feb 19, 2026, 9:04 PM

Vulnerability Rating

Custom Algorithm
spread
4.5
impact
5.4
exploitability
4.6
remediation
7.7
relevance
3.1
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.