CVE-2026-23613: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in GFI Software MailEssentials AI
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$TXB_URIs parameter to /MailEssentials/pages/MailSecurity/uridnsblocklist.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.
AI Analysis
Technical Summary
CVE-2026-23613 is a stored cross-site scripting vulnerability (CWE-79) affecting GFI MailEssentials AI versions prior to 22.4. The issue exists in the URI DNS Blocklist configuration page, where an authenticated user can supply malicious HTML or JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_URIs parameter of the /MailEssentials/pages/MailSecurity/uridnsblocklist.aspx endpoint. This input is stored and later rendered in the management interface, enabling script execution in the context of a logged-in user. The vulnerability has a CVSS 4.0 score of 5.1, reflecting medium severity. There is no information on available patches or vendor advisories in the provided data.
Potential Impact
Successful exploitation allows an authenticated user to execute arbitrary scripts within the management interface of GFI MailEssentials AI. This can lead to unauthorized actions performed with the privileges of the logged-in user, potentially compromising the integrity of the management interface. The impact is limited by the requirement for authentication and the medium CVSS score.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the URI DNS Blocklist configuration page to trusted administrators only and monitor for suspicious activity. Avoid entering untrusted input in the affected parameter. Follow vendor communications for updates on patches or official mitigations.
CVE-2026-23613: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in GFI Software MailEssentials AI
Description
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$TXB_URIs parameter to /MailEssentials/pages/MailSecurity/uridnsblocklist.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-23613 is a stored cross-site scripting vulnerability (CWE-79) affecting GFI MailEssentials AI versions prior to 22.4. The issue exists in the URI DNS Blocklist configuration page, where an authenticated user can supply malicious HTML or JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_URIs parameter of the /MailEssentials/pages/MailSecurity/uridnsblocklist.aspx endpoint. This input is stored and later rendered in the management interface, enabling script execution in the context of a logged-in user. The vulnerability has a CVSS 4.0 score of 5.1, reflecting medium severity. There is no information on available patches or vendor advisories in the provided data.
Potential Impact
Successful exploitation allows an authenticated user to execute arbitrary scripts within the management interface of GFI MailEssentials AI. This can lead to unauthorized actions performed with the privileges of the logged-in user, potentially compromising the integrity of the management interface. The impact is limited by the requirement for authentication and the medium CVSS score.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the URI DNS Blocklist configuration page to trusted administrators only and monitor for suspicious activity. Avoid entering untrusted input in the affected parameter. Follow vendor communications for updates on patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-01-14T16:02:29.335Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69975aafd7880ec89b287ca5
Added to database: 2/19/2026, 6:47:11 PM
Last enriched: 5/14/2026, 2:07:26 AM
Last updated: 5/22/2026, 6:44:47 PM
Views: 80
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