CVE-2026-23609
Stored XSS in GFI MailEssentials Perimeter SMTP Servers UI
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 on the Perimeter SMTP Servers configuration page, where an authenticated user can input malicious HTML or JavaScript code into a specific parameter. This code is then stored and later executed within the management interface when viewed by a logged-in user, potentially allowing unauthorized script execution.
How can this vulnerability impact me? :
The impact of this vulnerability includes the possibility of malicious scripts running in the context of a logged-in user within the management interface. This can lead to unauthorized actions such as stealing session tokens, manipulating the interface, or performing actions on behalf of the user, potentially compromising the security and integrity of the system.
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