CVE-2026-23608
Stored XSS in GFI MailEssentials AI Mail Monitoring Endpoint
Publication date: 2026-02-19
Last updated on: 2026-02-20
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| gfi | mailessentials | to 22.4 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a stored cross-site scripting (XSS) issue found in GFI MailEssentials AI versions prior to 22.4. It occurs in the Mail Monitoring rule creation endpoint, where an authenticated user can input HTML or JavaScript code into the JSON "name" field at the /MailEssentials/pages/MailSecurity/MailMonitoring.aspx/Save URL. This malicious code is then stored and later displayed in the management interface, which causes the script to execute in the context of a logged-in user.
How can this vulnerability impact me? :
The impact of this vulnerability is that an attacker who is authenticated can inject malicious scripts that execute in the context of other logged-in users. This can lead to unauthorized actions being performed on behalf of those users, theft of sensitive information such as session tokens, or other malicious activities within the management interface.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know