CVE-2026-23611
Stored XSS in GFI MailEssentials IP Blocklist Management
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 exists in GFI MailEssentials AI versions prior to 22.4 and is a stored cross-site scripting (XSS) issue found in the IP Blocklist management page.
An authenticated user can input malicious HTML or JavaScript code into a specific parameter (ctl00$ContentPlaceHolder1$pv1$txtIPDescription) on the IP Blocklist page.
This code is then stored and later executed in the context of a logged-in user when the management interface renders it, potentially allowing script execution within the application.
How can this vulnerability impact me? :
The vulnerability allows an authenticated user to execute arbitrary scripts in the context of other logged-in users.
This can lead to unauthorized actions being performed on behalf of users, theft of session tokens, or other malicious activities within the management interface.
Since the vulnerability requires authentication, the risk is limited to users who have access to the system, but it can still compromise the integrity and security of 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