CVE-2026-23618: GFI MailEssentials AI < 22.4 Anti-Spam Spam Keyword Checking Subject Condition Stored XSS
GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Spam Keyword Checking (Subject) conditions interface. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pvSubject$TXBSubjectCondition parameter to /MailEssentials/pages/MailSecurity/ASKeywordChecking.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-2026-23618?
CVE-2026-23618 is classified as a stored cross-site scripting vulnerability affecting GFI MailEssentials AI versions prior to 22.4.
How do I fix CVE-2026-23618?
To fix CVE-2026-23618, upgrade to GFI MailEssentials AI version 22.4 or later.
Who is affected by CVE-2026-23618?
CVE-2026-23618 affects authenticated users of GFI MailEssentials AI versions prior to 22.4 that utilize the Spam Keyword Checking feature.
What is the impact of CVE-2026-23618?
The impact of CVE-2026-23618 allows an authenticated user to inject HTML/JavaScript payloads, potentially compromising web application security.
Is there a workaround for CVE-2026-23618?
Currently, there are no publicly available workarounds for CVE-2026-23618 other than applying the patch by upgrading to the latest version.