XSS in Gestsup
CVE-2026-102372
GestSup versions before 3.2.62 fail to properly sanitize HTML email bodies in the IMAP LOGIN connector, allowing unauthenticated attackers to store arbitrary JavaScript in ticket descriptions and replies. Attackers can send emails to the monitored mailbox containing script tags and event handlers that execute in technician browsers, enabling ticket data theft and unauthorized actions.
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- gestsup.fr/index.php (release-notes)
- gestsup.fr/index.php (product)
- gestsup.fr/index.php (patch)
- www.vulncheck.com/advisories/gestsup-before-3.2.62-stored-xss-via-email-body-in… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-102372?
- CVE-2026-102372 is a medium-severity vulnerability in Gestsup, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-29.
- How severe is CVE-2026-102372?
- Medium severity. CVSS v3 base score is 6.1 out of 10.