Medium severity6.1NVD Advisory· Published Sep 29, 2026

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.

Patches

Vulnerability mechanics

References

gestsup.fr/index.phpnvd
gestsup.fr/index.phpnvd
gestsup.fr/index.phpnvd
www.vulncheck.com/advisories/gestsup-before-3.2.62-stored-xss-via-double-decoded-email-subject-in-oauth-imap-connectornvd

News mentions

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