High severity8.1NVD Advisory· Published Sep 25, 2026
CVE-2026-100389
CVE-2026-100389
Description
GestSup versions before 3.2.61 contain a remote code execution vulnerability in the basic IMAP connector's attachment handling that fails to skip blocked file extensions. Unauthenticated attackers can send emails with PHP attachments to monitored mailboxes, which are written to the web-accessible upload/ticket directory and executed when accessed.
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Affected products
1Patches
Vulnerability mechanics
References
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