CVE-2026-23605: GFI MailEssentials AI < 22.4 Attachment Filtering Rule Stored XSS
GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Attachment Filtering rule creation workflow. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXBRuleName parameter to /MailEssentials/pages/MailSecurity/attachmentchecking.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-23605?
CVE-2026-23605 has been classified as a medium severity stored cross-site scripting vulnerability.
How do I fix CVE-2026-23605?
To fix CVE-2026-23605, update GFI MailEssentials AI to version 22.4 or later.
Who is affected by CVE-2026-23605?
CVE-2026-23605 affects authenticated users of GFI MailEssentials AI versions prior to 22.4.
What kind of attack can CVE-2026-23605 enable?
CVE-2026-23605 can enable unauthorized execution of malicious JavaScript code in the context of the user's browser.
What actions can attackers take with CVE-2026-23605?
Attackers can exploit CVE-2026-23605 to execute scripts that compromise user data or perform actions on behalf of the user.