CVE-2026-23604CWE-79

GFI MailEssentials AI < 22.4 Keyword Filtering Rule Stored XSS

Medium · published February 19, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
10.1
In the wild
Unconfirmed
What it is

GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Keyword Filtering rule creation workflow. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_RuleName parameter to /MailEssentials/pages/MailSecurity/contentchecking.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00206 · 10.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-19T17:54Z
EPSS history
Timeline
  • 19 FEB 17:54Z
    GFI MailEssentials AI < 22.4 Keyword Filtering Rule Stored XSS
    cvelistv5