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DNS CVE-2026-23613

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-02-19 disclosure@vulncheck.com
5.4
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.4 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 22:03 vuln.today
CVE Published
Feb 19, 2026 - 18:24 nvd
MEDIUM 5.4

DescriptionCVE.org

GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the URI DNS Blocklist configuration page. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_URIs parameter to /MailEssentials/pages/MailSecurity/uridnsblocklist.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.

AnalysisAI

GFI MailEssentials AI prior to version 22.4 allows authenticated users to inject malicious scripts into the URI DNS Blocklist configuration page, which are stored and executed when administrators access the management interface. An attacker with valid credentials can exploit the unsanitized ctl00$ContentPlaceHolder1$pv1$TXB_URIs parameter to perform actions in the context of logged-in users, such as stealing session tokens or modifying security settings. No patch is currently available for this stored cross-site scripting vulnerability.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the management component of Mailessentials. GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the URI DNS Blocklist configuration page. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_URIs parameter to /MailEssentials/pages/MailSecurity/uridnsblocklist.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

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CVE-2026-23613 vulnerability details – vuln.today

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