What’s Vulnerable › Vulnerabilities

CVE-2026-102372: GestSup before 3.2.61 Stored XSS via Email Body in LOGIN IMAP Connector

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-29 · updated 2026-09-30
• Weakness: CWE-79

Description

GestSup versions before 3.2.61 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.

Affected products

• GestSup: before 3.2.61 — fixed in 3.2.61

How to fix

Upgrade to a fixed version: GestSup 3.2.61. Check the vendor advisory for mitigations.

References

• https://blog.spiizn.xyz/articles/remote-code-execution-turning-a-ticket-into-a-new-issue/
• https://gestsup.fr/index.php?page=changelog
• https://gestsup.fr/index.php?page=download
• https://gestsup.fr/index.php?page=download&channel=stable&version=3.2.61&type=patch
• https://www.vulncheck.com/advisories/gestsup-before-3.2.62-stored-xss-via-email-body-in-login-imap-connector

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