Is CVE-2026-102374 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-102374?

CVE-2026-102374 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-102374

Description

GestSup versions before 3.2.62 contain a stored cross-site scripting vulnerability in the IMAP OAuth connector that double-decodes MIME-encoded email subjects after HTML escaping. Unauthenticated attackers can send crafted emails to monitored mailboxes with nested MIME encoded-words to inject JavaScript that executes in technician sessions when viewing tickets.