CVE-2026-48539 in Archiver
Summary
by MITRE • 07/23/2026
GFI Archiver before 15.13 contains a stored cross-site scripting vulnerability in the MailInsights scheduled report configuration that allows authenticated attackers to inject arbitrary web script or HTML via the report name parameter to /Archiver/MailInsights.aspx. The injected payload is stored by ReportScheduling.btnSaveReport_Click() without output encoding and is executed in the browser of the user who created the scheduled report when they subsequently view the MailInsights page.
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Analysis
by VulDB Data Team • 07/23/2026
This vulnerability exists within GFI Archiver version 15.13 and earlier, representing a critical stored cross-site scripting flaw that undermines the security of email archiving systems. The vulnerability specifically targets the MailInsights scheduled report functionality where authenticated attackers can inject malicious scripts through the report name parameter. The flaw occurs in the /Archiver/MailInsights.aspx page when users configure scheduled reports, creating a persistent threat vector that affects all users who view these reports.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the ReportScheduling.btnSaveReport_Click() method. When users create scheduled reports with malicious payloads in the report name field, the system stores these inputs without proper sanitization or encoding mechanisms. This allows attackers to embed JavaScript code or HTML elements that persist in the application's database. The vulnerability manifests when legitimate users subsequently view the MailInsights page and encounter their own stored reports, triggering the execution of injected scripts within their browser context.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to compromise user sessions and potentially escalate privileges within the email archiving environment. An attacker who successfully exploits this vulnerability can execute arbitrary code in the context of other users' browsers, potentially accessing sensitive email data, stealing session tokens, or performing unauthorized actions within the GFI Archiver interface. This represents a significant threat to email security and data confidentiality, particularly in enterprise environments where email archiving systems contain sensitive corporate communications.
This vulnerability aligns with CWE-79 which defines cross-site scripting flaws as weaknesses that occur when an application fails to properly encode output or validate input, allowing malicious scripts to be executed in user browsers. The attack pattern follows the typical stored XSS methodology described in MITRE ATT&CK technique T1566.002 for credential access through phishing campaigns, where users are tricked into viewing malicious content that executes within their browser context. Organizations should implement immediate mitigations including input validation, output encoding, and regular security updates to prevent exploitation of this vulnerability.
The remediation approach requires updating to GFI Archiver version 15.13 or later where the vulnerability has been addressed through proper input sanitization and output encoding mechanisms. Security administrators should also deploy web application firewalls that can detect and block XSS payloads, implement content security policies to limit script execution, and conduct regular security assessments of email archiving systems. Additionally, user education regarding suspicious email behaviors and regular security awareness training can help prevent successful exploitation attempts through social engineering approaches that leverage this vulnerability.