CVE-2026-23605: 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 Attachment Filtering rule creation workflow. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_RuleName parameter to /MailEssentials/pages/MailSecurity/attachmentchecking.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-23605) is a stored cross-site scripting (CWE-79) issue in GFI MailEssentials AI before version 22.4. It occurs in the Attachment Filtering rule creation workflow where the ctl00$ContentPlaceHolder1$pv1$TXB_RuleName parameter accepts HTML/JavaScript input from an authenticated user. The input is stored and later rendered without proper neutralization, enabling script execution in the context of the management interface for logged-in users. The CVSS 4.0 base score is 5.1, indicating medium severity with network attack vector, low complexity, and limited impact on confidentiality, integrity, and availability.
Potential Impact
An authenticated user can exploit this vulnerability to execute arbitrary scripts within the management interface of GFI MailEssentials AI. This could lead to unauthorized actions performed with the privileges of the logged-in user, potential data exposure, or manipulation of the management interface. The impact is limited to authenticated users and the management interface context.
Mitigation Recommendations
No official patch or fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the management interface to trusted users only and avoid using the vulnerable Attachment Filtering rule creation workflow with untrusted input. Monitor vendor communications for updates on patches or official mitigations.
CVE-2026-23605: 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 Attachment Filtering rule creation workflow. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_RuleName parameter to /MailEssentials/pages/MailSecurity/attachmentchecking.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-23605) is a stored cross-site scripting (CWE-79) issue in GFI MailEssentials AI before version 22.4. It occurs in the Attachment Filtering rule creation workflow where the ctl00$ContentPlaceHolder1$pv1$TXB_RuleName parameter accepts HTML/JavaScript input from an authenticated user. The input is stored and later rendered without proper neutralization, enabling script execution in the context of the management interface for logged-in users. The CVSS 4.0 base score is 5.1, indicating medium severity with network attack vector, low complexity, and limited impact on confidentiality, integrity, and availability.
Potential Impact
An authenticated user can exploit this vulnerability to execute arbitrary scripts within the management interface of GFI MailEssentials AI. This could lead to unauthorized actions performed with the privileges of the logged-in user, potential data exposure, or manipulation of the management interface. The impact is limited to authenticated users and the management interface context.
Mitigation Recommendations
No official patch or fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the management interface to trusted users only and avoid using the vulnerable Attachment Filtering rule creation workflow with untrusted input. Monitor vendor communications for updates on patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-01-14T16:02:29.334Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69975aafd7880ec89b287c7b
Added to database: 2/19/2026, 6:47:11 PM
Last enriched: 5/14/2026, 2:06:34 AM
Last updated: 5/22/2026, 3:14:53 PM
Views: 116
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